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
The 3 Inch Cube Riddle
A 3 inch cube is painted on all sides with RED. The cube is then cut into small cubes of dimension 1 inch. All the so cut cubes are collected and thrown on a flat surface. What is the probability that all the top facing surfaces have RED paint on them?
Hint: Visualize the core of the cube.
ZERO.
The core of the 3 inch cube when cut, has all faces that are not painted. Hence at least one cube with no painted face always occurs. Did you answer this riddle correctly?
YES NO
The core of the 3 inch cube when cut, has all faces that are not painted. Hence at least one cube with no painted face always occurs. Did you answer this riddle correctly?
YES NO
Leave Me Alone And I Will Die
I have no ears, but more than one eye,
Cut me in half, I wont cry,
Leave me alone and I will die.
What am I?
Cut me in half, I wont cry,
Leave me alone and I will die.
What am I?
Hint:
A potato. The roots growing out of a potato are called eyes, when you cut a potato in half it doesnt produce any moisture and if you leave a poor potato to its own devices, it will die. Did you answer this riddle correctly?
YES NO
YES NO
A Country Of Great Animals
What country has great animals
Like a large bird called an emu
A cute and cuddly koala
Or a big hopping kangaroo?
Like a large bird called an emu
A cute and cuddly koala
Or a big hopping kangaroo?
Hint:
Wear A Ring One Is Quiet Many Sing Riddle
Has a blade of jagged cut.
Keeps the quickest hand out shut.
Goes in darkness.
Wears a ring. One is quiet. Many sing?
Keeps the quickest hand out shut.
Goes in darkness.
Wears a ring. One is quiet. Many sing?
Hint:
Turn Me On My Side And I Am Everything Riddle
Hint:
The number 8. On its side, the number 8 looks like an infinity symbol. Cut in half, the number 8 becomes two zeros. Did you answer this riddle correctly?
YES NO
YES NO
Riddle Of The Two Barbers
A man arrives at a small town and needs to get his hair cut. He discovers there are just two barbers in the town. He visits the first one and finds that he has a clean haircut and a clean place. Then he visits the second one and finds his place is a mess and he has an awful haircut.
After a moment of consideration, he decides to have his haircut done by the second barber.
Why?
After a moment of consideration, he decides to have his haircut done by the second barber.
Why?
Hint:
Both barbers must go to the other barber to get their haircuts. Since the first barber had a clean haircut, that means the second barber gives good haircuts and the first barber doesn't. Did you answer this riddle correctly?
YES NO
YES NO
Weep Beside Me
Hint:
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:
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