The Last Cookie Riddle
Mike and James are arguing over who gets the last cookie in the jar, so their dad decides to create a game to settle their dispute. First, Mike flips a coin twice, and each time James calls heads or tails in the air. If James gets both calls right, he gets the last cookie. If not, Mike picks a number between one and six and then rolls a die. If he gets the number right, he gets the last cookie. If not, James picks two numbers between one and five, then spins a spinner with numbers one through five on it. If the spinner lands on one of James' two numbers, he gets the last cookie. If not, Mike does.
Who is more likely to win the last cookie, Mike or James? And what is the probability that person wins it?
Who is more likely to win the last cookie, Mike or James? And what is the probability that person wins it?
Hint: Their dad is a very smart person.
Believe it or not, both Mike and James have a 1/2 chance of winning.
James wins if:
-he calls both coin flips right = 1/2 x 1/2 = 1/4
OR
-he does not call both coin flips right, Mike does not call the die roll correctly, and he guesses the number on the spinner right = 3/4 x 5/6 x 2/5 = 30/120 = 1/4
1/4 + 1/4 = 1/2
Mike wins if:
-James does not call both coin flips right and he calls the die roll correctly = 3/4 x 1/6 = 3/24 = 1/8
OR
-James does not call both coin flips right, he does not call the die roll correctly, and Mike does not guess the number on the spinner right = 3/4 x 5/6 x 3/5 = 45/120 = 3/8
1/8 + 3/8 = 1/2
Of course, dad could have just flipped a coin Did you answer this riddle correctly?
YES NO
James wins if:
-he calls both coin flips right = 1/2 x 1/2 = 1/4
OR
-he does not call both coin flips right, Mike does not call the die roll correctly, and he guesses the number on the spinner right = 3/4 x 5/6 x 2/5 = 30/120 = 1/4
1/4 + 1/4 = 1/2
Mike wins if:
-James does not call both coin flips right and he calls the die roll correctly = 3/4 x 1/6 = 3/24 = 1/8
OR
-James does not call both coin flips right, he does not call the die roll correctly, and Mike does not guess the number on the spinner right = 3/4 x 5/6 x 3/5 = 45/120 = 3/8
1/8 + 3/8 = 1/2
Of course, dad could have just flipped a coin Did you answer this riddle correctly?
YES NO
A Knight To The Rescue
A knight comes to a castle where his love is trapped. The castle is surrounded by a square moat that is 10 feet wide (it forms a square around the castle). The knight is able to fashion two 9 foot long planks to cross the moat.
How can he do this?
How can he do this?
Hint:
He puts one plank across the corner of the square (where two sides meet) and puts the other perpendicular to it to form a 'T' shape in the corner allowing him to cross the moat and save his beloved. Did you answer this riddle correctly?
YES NO
YES NO
Weep Beside Me
Hint:
I Am Up In The Sky
I am white, I hang out being where birds take flight. I am up n the sky so I can sit and spy, I look down on every fellow. When I'm gone you seek your pillow. What am I?
Hint:
This Is War
Castles may rise and castles may fall
Soldiers will fight and stand tall
Lords of war are enjoying the kill
Not really caring about lives they spill
Winners take all, winners are brave
But in this war they are buried in a grave
What is this war?
Soldiers will fight and stand tall
Lords of war are enjoying the kill
Not really caring about lives they spill
Winners take all, winners are brave
But in this war they are buried in a grave
What is this war?
Hint:
Chess game.
(Lords of war=the two players)
(..they are buried in a grave=placed in the chess box upon finishing the game) Did you answer this riddle correctly?
YES NO
(Lords of war=the two players)
(..they are buried in a grave=placed in the chess box upon finishing the game) Did you answer this riddle correctly?
YES NO
The Red Hat
Once upon a time there lived a king who wished to find the wisest man in the realm to be his assistant. He summons the 3 known wisest men to his court and he administers the following test.
He sits them in a circle, facing each other and he says Im going to put either a red hat or a white hat on each of your heads. He proceeds to place a red hat on each of their heads. Obviously they can see each other but there are no mirrors in the room so they cant see whats on their heads. He says If you can see a red hat, raise your hand. They all raise their hands. Then he says If you can tell what color hat you have on, stand up.
Time goes on, one guy looks at another guy, he looks at the other guy. The other guy looks at him. Finally one guy stands up. The question is how did he know he was wearing a red hat?
He sits them in a circle, facing each other and he says Im going to put either a red hat or a white hat on each of your heads. He proceeds to place a red hat on each of their heads. Obviously they can see each other but there are no mirrors in the room so they cant see whats on their heads. He says If you can see a red hat, raise your hand. They all raise their hands. Then he says If you can tell what color hat you have on, stand up.
Time goes on, one guy looks at another guy, he looks at the other guy. The other guy looks at him. Finally one guy stands up. The question is how did he know he was wearing a red hat?
Hint: For a moment or two, nobody moved. Nobody knew for certain what color his hat was, and thats what told the wisest guy that all of the hats were red.
Step 1:
Wiseguy #1 knows he can see two red hats.
Step 2:
Wiseguy #1 thinks, "Hey, if I were wearing a white hat, Wiseguy #2 would see one red hat and one white."
Step 3:
Wiseguy #1 then thinks, "If I were wearing a white hat, and Wiseguy #2 saw one red hat and one white (and if he were wearing a white hat himself), then Wiseguy #3 would have seen two white hats. So, Wiseguy #3 wouldnt have raised his hand to the first question.
Wiseguy #1 thinks, "If that were true, Wiseguy #2 would be sure that he had a red hat. But since Wiseguy #2 was actually unsure about his hat color, it can only mean one thing, my hat is red." Did you answer this riddle correctly?
YES NO
Wiseguy #1 knows he can see two red hats.
Step 2:
Wiseguy #1 thinks, "Hey, if I were wearing a white hat, Wiseguy #2 would see one red hat and one white."
Step 3:
Wiseguy #1 then thinks, "If I were wearing a white hat, and Wiseguy #2 saw one red hat and one white (and if he were wearing a white hat himself), then Wiseguy #3 would have seen two white hats. So, Wiseguy #3 wouldnt have raised his hand to the first question.
Wiseguy #1 thinks, "If that were true, Wiseguy #2 would be sure that he had a red hat. But since Wiseguy #2 was actually unsure about his hat color, it can only mean one thing, my hat is red." Did you answer this riddle correctly?
YES NO
I Am Two-faced Riddle
I am two-faced, but bear one head.
Men spill their blood for me.
I have no legs but travel widely.
I make kings immortal.
I am potent when shared,
Yet greed for my power keeps me locked away.
What am I?
Men spill their blood for me.
I have no legs but travel widely.
I make kings immortal.
I am potent when shared,
Yet greed for my power keeps me locked away.
What am I?
Hint:
I Have Four Legs Riddle
Hint:
Jumping To The Beat Riddle
Hint:
I'm Typically In A Man's Pants Puzzle
Here's a tricky adult riddle for you. You have 4 picture clues hinting at the answer: people standing outside of a store, a fish, a menu and some plants. Can you solve this in under 30 seconds?
Hint: Teenage girls love to blow me.
I'm A Yellow Fellow Riddle
Im a yellow fellow with a pointed head.
As thin as thin can be.
But I leave a trail on a blank white page
When someone writes with me. What might I be?
As thin as thin can be.
But I leave a trail on a blank white page
When someone writes with me. What might I be?
Hint:
Driving At Midnight Riddle
I was driving at midnight on Jan. 31. It was freezing cold in New York. I was on an isolated unpaved road when my car battery went dead. The headlights went off, and I coasted to a stop. There were no moon or stars out, and no human-made lights visible. Yet I clearly saw a mouse cross the road, and could tell that it was brown, not gray. How is this possible?
Hint:
Smell Very Sweet Riddle
I am a melon that is orange on the inside with lots of seeds. I smell very sweet. My vitamin A helps to give you strong bones. What am I?
Hint:
Locks That Don't Need A Key
I had many locks that don't need a key
I was far too many for you to count me
I was never to be shortened, for a vow had been said
I was a symbol of strength that flowed from the head
But in a moment of weakness, my secret was out
I lay all in pieces when she gave the shout
I'm in the Bible - what am I?
I was far too many for you to count me
I was never to be shortened, for a vow had been said
I was a symbol of strength that flowed from the head
But in a moment of weakness, my secret was out
I lay all in pieces when she gave the shout
I'm in the Bible - what am I?
Hint: Judges 16
I Bake, I Rest Riddle
I bake, I rest, I come in different shapes, sizes, and types. I am eaten, I am sliced, I am licked, poked, squashed, and I have a man and woman on my head. What am I?
Hint:
Add Your Riddle Here
Have some tricky riddles of your own? Leave them below for our users to try and solve.