Riddles of the Day 11 Jul 2024 - 103 Riddles Picked For You!

Your daily dose of brain teasers and challenges

What Has A Neck But No Head

I have a neck but no head. What am I?

Think about something you might find in a closet or a dresser...

A bottle.

Eyesight Problems

Mr. Plessy, one of the best pilots in his town, came to his insurance company to file a report. He said that someone had robbed him in the street, but he couldn't see what the robber had looked like because of his poor eyesight. The insurance manager refused to proceed with the case and called Mr. Plessy a liar. Why?

Think about Mr. Plessy's profession and how it relates to his claim...

Mr. Plessy is a pilot, but it's impossible to work as one if you have poor eyesight.

A Person Was In Jail, All He Had In His Cell Was A Piano. Yet, He Managed To Escape. How?

A person was in jail, All he had in his cell was a piano. Yet, he managed to escape. How?

Think about the piano's purpose beyond making music...

He played the piano until he found the right key.

Anger Is Danger (Without The D)

Terry was having a bad day, after having a bad week and a bad month. His long-time bridge partner had just moved away, and the stock he held in the Red Roof Inn Company had just taken a nose-dive. He felt he was ready to snap, as he climbed into his car and began to drive. Suddenly, Terry felt something snap but realized it was only a pencil he had in his pocket, but this mild irritation only fueled his pent-up anger. Terry stepped on the accelerator and headed straight for a green sedan, smashing into it and causing its trunk to fly open. He then put his car into reverse, and backed into a red mini-van, causing its hood to pop up and its radiator to burst, sending a shower of radiator fluid shooting high into the air. After continuing to smash into at least a dozen other vehicles, Terry's car finally stopped, and somehow, he miraculously stepped out of his car uninjured. Just a few moments later, two police officers, who had witnessed the entire event without intervening, approached Terry and gave him something that made him -- smile. Why hadn’t the police called for backup and intervened earlier to prevent additional damage from being done, and what was it they gave Terry which made him smile?

Here's a hint: Think about the context in which Terry's destructive behavior was taking place. It's not what you might expect from a typical driving scenario...

The two police officers had given Terry a First Place Trophy for his having just won a Demolition Derby they had all just witnessed.

Which Way

A man goes to work at the same time each day and travels part of his journey facing forwards and the remainder facing backwards. When he returns at the end of his working day, he only faces forwards. How can this be?

Think about a mode of transportation that involves facing different directions, but the person's physical body remains facing forward...

He works in the engine room of a liner! To get to work, he walks along the decks from his cabin facing forwards, and down the ladders between decks facing backwards.  However, when he finishes, he only needs to face forwards to climb the ladders again and walk along the deck back to his cabin.

How Many Months Have 28 Days

How many months have 28 days?

Think about the minimum number of days a month can have...

All of them.

Don't Whisper

What two reasons why whispering in company is not proper?

"Think about the impact on others when you're having a private conversation in a public setting..."

It is not aloud (allowed).

Wealthy Fisherman

Why ought a fisherman to be very wealthy?

Think about the treasure he often pulls out of the sea...

Because his is all net profit.

Lies And Truths

If I say I am lying, am I telling the truth?

Think about the paradox of self-reference...

This is impossible to solve, because if I were telling the truth, then I would be lying, which doesn't make sense since I am telling the truth. If I am lying, then what I said was true and that doesn't make sense either.

Once Upon A Time There Was A Beautiful Princess Named Anna. Anna's Father, The King

Once upon a time, there was a beautiful princess named Anna. Anna's father, the King, wanted to be sure his daughter married an intelligent man. To test his daughter's suitors the King hid Anna's picture in one of three boxes. The suitor had to be able to select the box with Anna's picture on one try and within twenty seconds. On the gold box was the message "Anna's picture is in this box". The silver box had the message "Anna's picture is not in this box." "Anna's picture is not in the gold box" was written on the bronze box. The King would tell each suitor "Only one of the three messages is correct." Which box contained Anna's picture?

Think about it like this: if a message is true, what would it imply about the other two boxes?

The silver box contained Anna's picture. If her picture had been in the gold box, two statements would have been true. (The messages on both the gold box and the silver box.) If her picture had been in the bronze box, two statements would have been true. (The messages on the bronze box and the silver box.)

Since A Person Uses About The Same Amount Of Energy Walking 2 Miles Riddle

Since a person uses about the same amount of energy walking 2 miles as they would run for 2 miles, would a person use more energy running for 10 minutes, walking for ten minutes, or the same amount of energy?

Think about the pace, not the distance!

Since a person running for 10 minutes would cover more distance than that same person would walking for 10 minutes, he would use more energy running for 10 minutes.

Left Handed

What are the 2 longest words in the English language that can be typed using only your left hand on the keyboard?

Think about the layout of a standard QWERTY keyboard and focus on the keys that are easily accessible by your left hand...

1: Stewardesses 2: Reverberated

I'm Invisible To The Eye

I'm invisible to the eye. I can never die but without me, you will die. People keep me in jars and boxes but when will they realize that I'm as close as thin air. I'm never easy to be found but sometimes caught lurking around. What am I?

"Think about something that is essential for human survival, yet it's not a living thing and can't be seen with the naked eye. It's often stored in containers, but it's also all around us, and sometimes it can be felt or sensed, even if it can't be directly seen."

Your soul.

It's Troublesome Being This Tall!

The giraffe is taller than the lion but shorter than the palm tree. Which animal is the tallest?

Think outside the zoo...

The giraffe is the tallest animal. A palm tree is not an animal, duh!

The Burnt Hipster

How did the hipster burn his tongue?

"He drank his coffee before it was cool..."

He sipped his coffee before it was cool.

Newspaper Divider

Tom and his younger sister were fighting. Their mother was tired of the fighting and decided to punish them by making them stand on the same piece of newspaper in such a way that they couldn't touch each other. How did she accomplish this?

Tom's mother slid a newspaper under a door, each sibling standing on each side.

What Language Does A Billboard Speak

What language does a billboard speak?

Think about the purpose of a billboard and what it's trying to convey to its audience...

Sign language.

Why Are Artist No Good In Sports Matches

Why are artist no good in sports matches?

Think about the tools they use to create their masterpieces...

Because they keep drawing.

Much Needed Sleep

Why did Silly Billy tiptoe past the medicine cabinet?

Think about a common phrase associated with medicine...

He didn't want to wake up the sleeping pills.

Nice One

Why did the skeleton go to the barbecue?

Think about what skeletons lack, and how that might relate to a barbecue...

To get some spare - ribs.

Bow Tied

Which bow can't be tied?

Think about a type of "bow" that is not related to strings or ribbons...

A rainbow.

Ghost Riddle

What do you call a ghost without a host?

A spectral solo...

G.

Captain Kirk Of Star Trek Has The Usual Left Ear And Right Ear, But He Also Has A Third Ear

Captain Kirk of Star Trek has the usual left ear and right ear, but he also has a third ear. What is his third ear called?

The final front ear.

Pharos Car

What kind of car does a pharaoh drive?

A new bus.

The Hot Crazy Matrix

What do you call a girl who's more than an eight hot and less than a five crazy?

A unicorn because they don't exist.

Tv Shows

What shows do prisoners like to put on?

Think about the type of "show" that prisoners might be forced to participate in, rather than a TV or theater show...

A cell-out (sell out).

Rock And Roll Riddle

What do fathers sing in the shower?

Think "family ties" and a common musical term...

Pop.

Swallowed Spoon

What would happen if a girl swallowed her spoon?

She'd be stirring up trouble!

She couldn't stir.

Medical Elephant Joke

What do you call an elephant's skin doctor?

Think about a profession that deals with skin, and add a "tusk"-worthy twist!

A pachydermatologist!

Riddle Proverb 4: An Excess Of Individuals Skilled In The Preparation Of Edibles Impairs The Quality Of This Soup

An excess of individuals skilled in the preparation of edibles impairs the quality of this soup. What is the proverb?

Think about a common saying that warns against having too many people involved in a particular task...

Too many cooks spoil the broth.

Money's In The Bag

Lucy went onto a game show, and she was one task away from winning the grand prize: $500,000.00. She was shown four bags; one of these bags had the cash prize inside, while the other three were empty. Lucy had only one chance to choose the bag with the money. Each bag had a statement on it, but only one statement was true. A: The money is in either Bag B or Bag C. B: The money is in either Bag A or Bag D. C: The money is in this bag. D: The money is not in this bag. Which statement is true, and which bag has the money?

"Look for the statement that, if true, would make another statement false, and vice versa..."

Statement B is true. Bag D has the money. If Bag A had the money, then statements B and D would both be true. If Bag B had the money, then statements A and D would both be true. If Bag C had the money, then statements A, C, and D would all be true. But, we only need one true statement. If Bag D had the money, then the statements on all of the bags would be false, except for that on Bag B. This matches the conditions, so the money is in Bag D.

What Should He Say?

Chris wants to enter an exclusive club, but the security guard in front of the door always asks for a password. Chris decides to eavesdrop on clubgoers, and this is what he sees: A woman walks up to the security guard. The guard says "12", and the woman replies "6". The woman is granted access. A man walks up to the security guard. The guard says "6", and the man replies "3". The man is granted access. Another woman walks up to the security guard. The guard says "10", and the woman replies "5". This woman is NOT granted access. Chris thinks he's seen enough, and he walks up to the security guard. The guard says "4". What should Chris say to get into the club?

Pay attention to the numbers and the responses, but also think about the characteristics of the people who were granted access...

To get into the club, Chris should say "4". The task was not to divide the number by two (after all, not all numbers are divisible by two). Instead, the task was to say how many letters are in the number the security guard says. "Twelve" has 6 letters. "Six", in turn, has 3 letters. "Ten" also has 3 letters, so the second woman should have said "3", not "5". Chris should say "4" because "four" consists of 4 letters.

How Can You Say Robert And Richard Purchased A Rotweiler Without Using Any R's

How can you say - "Robert and Richard Purchased A Rotweiler" without using any R's?

Think about how you can represent words without using their actual letters...

Bob and Dick bought a dog.

In The Stable

In a stable there are men and horses. In all, there are 22 heads and 72 feet. How many men and how many horses are in the stable?

Think about the number of feet each man and horse has...

14 horses and 8 men. 14x4 plus 8x2 = 72 feet.

Pi Day Riddle

Three point one four, one five nine two six five, three five eight nine... What am I?

Think about a famous mathematical constant that is often memorized to many decimal places...

Pi - π.

How Many?

A boy has as many sisters as brothers, but each sister has only half as many sisters as brothers. How many brothers and sisters are there in the family?

Think about the symmetry of the statement...

Four brothers and three sisters.

How Do You Measure Nine Minutes With Two Hourglasses?

How can you measure nine minutes with have two hourglasses, one four minute and one seven minute?

Think about how you can use the two hourglasses in a sequence, rather than simultaneously, to measure out the desired time...

Turn over both hourglasses at once. When the four-minute hourglass runs out, turn it over. When the seven-minute hourglass runs out, turn it over. When the four-minute timer runs out this time (eight minutes have elapsed), the seven-minute hourglass has been running for one minute. Now turn over the seven minute timer back over. When the timer runs out, nine minutes have elapsed.

Solution To Solid Square

An officer wishing to arrange his men in a solid square found by his first arrangement that he had 39 men left over. He then started increasing the number of men on a side by one, but found that 50 additional men would be needed to complete a new square. How many men did the officer have?

Think about the differences between consecutive perfect squares...

The officer had 1975 men. When he formed a square measuring 44 by 44, he had 39 men over. When he tried to form a square 45 x 45, he was 50 men short.

Two Fractions

0,1,2,3,4,5,6,7,8,9 How can you use the digits above once each only to compose two fractions which when added together equal 1?

Think about placing the digits in a way that creates a "heavy" fraction and a "light" fraction, where the heavy one is close to 1 and the light one is close to 0...

35/70 + 148/296 = 1

How Many Items?

An item is made from lead blanks in a lathe shop. Each blank suffices for 1 item. Lead shavings accumulated for making 6 items can be melted and made into a blank. How many items can be made from 36 blanks?

From 36 blanks there are 36 items made. The lead shavings are enough to make 6 blanks. Which make 6 more items. But don't stop here. The new shavings are good for 1 more item. Total: 43.

What Type Of Music Is A Mummy's Favorite?

What type of music is a mummy's favorite?

Think about the wrapping style of a mummy...

Wrap.

Eleven Plus Two Equals One

If eleven plus two equals one, what does nine plus five equal?

Think about a clock...

11 o'clock plus 2 hours = 1 o'clock 9 o'clock plus 5 hours = 2 o'clock

What Goes In Hard Comes Out Soft, And You Blow Continuously

What goes in hard, comes out soft, and you blow continuously?

Think about something you might find in a birthday party...

Bubble Gum.

Snow People

What is the difference between a snowman and a snow-woman?

Snowballs.

F Like Death Riddle

Why is the letter F like death?

Think about the sounds and symbols associated with both...

Because without it life is a lie, or it makes life a lie.

How Many Of Each Type Of Animal Did Moses Take On The Ark

How many of each type of animal did Moses take on the Ark?

Think biblical figures, but not the one you'd expect...

None, it was Noah.

Bagels For Breakfast

You're sitting down for breakfast and realize you have 4 bagels left. You know you'll run out in four days so you cut them in half. How many bagels do you have now?

Think about the action of "cutting in half" rather than the quantity of bagels...

4 Bagels.

What Do You Call A Robot That Takes The Longest Route

What do you call a robot that takes the longest route?

Think about a word that means "to wander" or "to go in a roundabout way"...

R2-dtour.

Lemon Cat

What do you get when you cross a black cat and a lemon?

Think about the phrase "when life gives you..."

A Sour Puss.

Saw Can Not Cut Riddle

What is made of wood but no saw on earth is sharp enough to cut?

Think about something you might find in a forest, but not a living tree...

Sawdust.

Pirate Movie

Why didn't the 11 year old enter the pirate movie?

Think about the "rating" of the movie...

It was rated "ARR".

Ripped Jeans

How did the farmer fix his jeans?

Think about the farmer's profession and what tools he might have readily available...

With a cabbage patch!

Singing Smart

What do computer programmers sing in the shower?

Think "algorithm" meets "harmony"...

Disc-o.

Funny Homework Question

Why was the student's homework in his father's handwriting?

Because the student borrowed his pen.

Why Can't You Keep A Clock In Jail?

Why can't you keep a clock in jail?

Think about the concept of "time" in a prison setting...

Because time is always running out

Why Do Many Orchestras Have Bad Names?

Why do many orchestras have bad names?

Think about the musical term that describes the group of musicians, and how it relates to the quality of their name...

Because they don't know how to conduct themselves.

Medusa's Favorite Cheese

What is Medusa's favorite cheese?

A hiss-terical question! Here's a hint: Think about the "petrifying" effect Medusa has on people...

Gorgonzola.

Tennis Players

Why were the tennis players arrested?

Think about the "serve" in tennis...

Because they had racquets.

Redo What Has Been Undone

You buy me taken apart, To redo what has been undone; Four of my pieces have one sharp corner, The rest of them have none. What am I?

Think about something you might find in a sewing kit or a tailor's shop...

A jigsaw puzzle.

A Riddle About Finishing

I always come in second, but I always finish sooner than anyone else. What am I?

Think about a competition or a race where there's a clear winner and a runner-up...

February.

The Killer

If you eat me, you will die. If you drink me, you will die. I am greater than God, worst than the Devil. What am I?

Think about something that can be both consumed and has a powerful, even ominous, presence...

Nothing. If you eat nothing, you will die. If you drink nothing, you will die. Nothing is greater then God. Nothing is worst then the Devil.

Volume Of Grief

My life is often a volume of grief, your help is needed to turn a new leaf. Stiff is my spine and my body is pale, but I'm always ready to tell a tale. What am I?

Think about an object that's often associated with stories and information, but can also be a symbol of sadness or mourning...

A book!

I Like To Twirl My Body But Keep My Head Up High

I like to twirl my body but keep my head up high. After I go in, everything becomes tight. What am I?

Think about something you use daily, often without much thought, but it's essential for keeping things in place...

Screw

Don't Overthink.

I stump people, I hurt people's brains. But when people get me, when they understand me, they are satisfied. What am I?

Think about something that's puzzling or perplexing at first, but once you figure it out, you feel a sense of accomplishment and pleasure...

A riddle.

Brave Enough?

I make you weak at the worst of all times. I keep you safe, I keep you fine. I make your hands sweat, and your heart grow cold, I visit the weak, but seldom the bold. What am I?

Think about a situation where you're most vulnerable, and a certain presence can either harm or protect you...

Your fears.

To Cut Things Up Is My Fate

My teeth are sharp, my back is straight, to cut things up it is my fate. What am I?

Think about something you might find in a kitchen, used for preparing food...

A Saw.

Easier Than You Think.

I am what you seek, I am only what is right. I am never wrong. I could be short I could be long. What am I?

Think about something that is always correct and can vary in length, often used to guide or direct...

I am the answer to the question.

Dip Me In Water And I Become Smaller

My shape and sizes differ. Every time you dip me in water, I become smaller. What am I?

Think about something you might find in a cup or mug, and how it changes when it meets hot water...

Soap.

When You Take A Look At My Face You Will Not Find The Number

When you take a look at my face, you will not find the number thirteen in any place. What am I?

Think about a common object you might find in a public area, often displaying information...

A clock.

I Can't See, Count, Or Clap

I have hands but I can't clap. I have a face but I can't see. I have numbers but I can't count. What am I?

Think about something you might find on a wall, but it's not a living thing...

A clock.

Day, NIGHT.

I you don't move I move, if you move I still move. I can shine but am not a light bulb. I will fall before you wake up. What am I?

Think about something that's closely related to your daily routine, especially in the morning...

The Moon.

I'm White, Perfect For Cutting And Grinding

I'm white, perfect for cutting and grinding. For most animals, I am a useful tool. What am I?

Think about something that's often found in a dentist's office, but is also useful for many animals in the wild...

Teeth.

Ocean Roamer

I roam the empty oceans pounding up over rocks, I make streams pour down peoples faces but some people like to ride me. What am I?

Think about a natural force that can be both fierce and exhilarating, and is often associated with the ocean and rocky coastlines...

Waves.

Found In You!

Many always do say that I am life. I occupy most part of the earth surface, yet I'm found in you. What am I?

Think about something that's essential for life, covers a significant portion of the Earth's surface, and is also present within every living being...

Water.

What Changes Colour Once It Is Halved?

I start off red, then I am halved, and turn blue. I am then halved once again, and turn pink. What am I ?

Think about something you might find in a fruit bowl...

Australian notes (money) $20 note is red $10 note is blue And a $5 note is pink!

I Am Eternal

Not only am I powerful enough to hurt like no other, I also have the power to heal like no other, but just like everything else, I can break. Life would be impossible without me, but it's already near impossible to find me. What am I?

Think about something that can have a profound impact on our well-being, both positively and negatively, and is essential for human survival, yet is increasingly scarce in today's world...

True love.

A Dreaded Thing

I am typically feared by both women and men. I often come for the old, but also for some young people who are very ill. Many will fight me in vain, and many others live in denial of me. Those who embrace me will lose their fear of me, but they will lose something of themselves in the process. What am I?

Think about something that is often associated with the end of life, but can also strike unexpectedly, and is often met with resistance or avoidance...

Baldness. (Note that 'death' doesn't fit the last clue. Those who embrace death lose ALL of themselves. Those who shave their head just lose something of themselves. Also, death ALWAYS comes for the old eventually, not just 'often'.)

I Am Humble In My Greetings, But Forget My Whole

Riddle me this. I am humble in my greetings, but forget my whole and you are sure to find hell. What am I?

Think about a common phrase people use when greeting each other, and how removing a single word from that phrase can lead to a very different and ominous outcome...

Hello.

What Demands An Answer, But Asks No Question

What demands an answer, but asks no question?

A telephone.

Listen Very Carefully L.o.l

What word is right when pronounced wrong, but is wrong when pronounced right?

Think about a word that is commonly mispronounced, but when you say it incorrectly, it's actually correct...

The answer is wrong think about it.

If You Feed Me, I Live, But If You Water Me, I Die Riddle

If you feed me, I live, but if you water me, I die. What am I?

Think about something you might find in a kitchen, but not in a garden...

A Fire

Pumpkins Or Apples?

Lynn likes grapes but not potatoes. She likes squash but not lettuce, and she likes peas but not onions. Following the same rule, will she like pumpkins or apples?

Think about the color of the food...

Pumpkins. Lynn only likes things that grow on vines.

Never Out Of Style

Fashions change but what can a person wear that is never out of style?

Think about something that is always "on" a person, regardless of the current fashion trends...

A smile.

Alphabet Riddles

Which is the most curious letter?

Think about a letter that asks a question...

Y?

Two Numbers Riddle

Take two numbers, such that the square of the first, plus the square of the second, shall equal 8; while the first, plus the product of the first and second, shall equal 6. What are the two numbers?

Think algebraically, and consider a system of equations involving x and y, where x and y are the two numbers. Pay close attention to the relationships between x, y, x^2, and y^2.

2 and 2.

Unhappy Cranberries

What do you call unhappy cranberries?

Think about a common phrase used to describe a group of people who are unhappy or upset...

Blueberries.

Welcome To Miami

What kind of tree can you carry in your hand?

Think small, think portable, and think about a type of tree that's often associated with a specific season or holiday...

A palm tree.

What Are The Alligator's Favorite Shoes

What are the Alligator's favorite shoes?

"Think about where an alligator might live..."

Crocs.

Two Eyes In Front And Many Many More Behind

The strangest creature you'll ever find: Two eyes in front and many many more behind. What is it?

Think about something you might find on a desk or in a school supply box...

A Peacock.

Six Legs But Walks On Four Feet Riddle

What has six legs, two heads, four ears, and two hands, but walks on four feet?

Think about something you might find in a family photo album...

A horse and rider.

What U.S State Sounds Like Everyone There Is Happy

What U.S state sounds like everyone there is happy?

Think about a state's name that sounds like an emotional expression...

Mary-land.

Three Brothers Share A Family Sport, A Nonstop Marathon

Three Brothers share a family sport, a nonstop marathon. The oldest one is fat and short And trudges slowly on. The middle brother's tall and slim, and keeps a steady pace The youngest runs just like the wind, going swiftly through the race "He's young in years, we let him run," the other brothers say. "Though he is surely number one, he's also second in a way. What are we?

Think about a type of "race" that involves movement, but not necessarily physical running...

Hands on a Clock.

Mad Scientist

One day, a scientist was down in his lab. It was around 11 o'clock. He was working late on poisons and their antidotes. He was hungry, so he went to get a snack. Suddenly, he found himself tied to a chair. There was a nasty-looking robber in front of him. The robber had his wife. He said,' I will only leave you and your wife if you feed her 1 whole teaspoon of poison of your choice, if you don't, then I will kill you both'. The scientist fed his wife an entire teaspoon of a type of poison from his lab, but the wife did not die, how? There were blue, red, white, green, yellow, and pink-colored poisons in his lab. All of them were deadly. Which one did the scientist choose?

Think about the situation and the fact that the scientist is a expert in poisons and their antidotes...

The white one, since sugar is known as 'White Poison'.

What Has Teeth But Can Not Eat?

What has teeth but can not eat?

Think about something you might find in a bathroom...

A comb.

What Is The First Thing A Gardener Sets In His Garden?

What is the first thing a gardener sets in his garden?

Think about the very beginning of a gardener's work, even before they plant anything...

His foot.

The Giver,the Taker And The Grower

What takes all, gives all, and grows all?

Think about something that consumes everything in its path, yet produces more of itself, and ultimately leads to the growth and development of others. It's a natural process that's essential for life.

Time.

I Walked Down The Street Day And I Found Something That Had Worth

I walked down the street day and I found something that had worth. You make sure you don't lose it. It has a color, size, and shape but everyone is different. You touch it, enjoy it, like it, and always count it over. What is it?

Money.

No One Wants It, No One Wants To Lose It..

What is it that no one wants, but no one wants to lose?

A lawsuit.

On Earth I Am Dead Riddle

On Earth, I am dead, Though I live on the moon. I am in no crater, And I'm in every boom. What am I?

Think about the sounds you hear on Earth and in space...

The Letter "0".

Colorful

What has every color in the rainbow no matter what?

Think about something you might find in a dark room...

A rainbow.

Comes Out Black

What goes in the water red, and comes out black?

Think about something you might use to write or draw with...

Iron.

What Falls And Rises But Never Moves

What falls and rises but never moves?

Think about something that changes its position or state, but its physical location remains the same...

A stockmarket.

The Man In The Mask

A masked man is being hunted by the authorities for his vigilante activities, in which he helps and protects innocent people. His modus operandi is to seek out injustices caused by corrupt and evil people, stop these people from completing their wicked plans, and to deliver his own personal letter to these villains --- something to remind them of his visit. Who is this masked man, and what is the personal letter he delivers?

Think of a classic literary character who is known for seeking justice and leaving a calling card at the scene of their interventions...

The masked man is Zorro, and the personal letter he delivers to the villains he thwarts ----- is the letter "Z".