The Same Birthday Riddle
How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?
Hint:
Only twenty-three people need be in the room, a surprisingly small number. The probability that there will not be two matching birthdays is then, ignoring leap years, 365x364x363x...x343/365 over 23 which is approximately 0.493. this is less than half, and therefore the probability that a pair occurs is greater than 50-50. With as few as fourteen people in the room the chances are better than 50-50 that a pair will have birthdays on the same day or on consecutive days. Did you answer this riddle correctly?
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The Prime Number Riddle
Two hundred people in an auditorium are asked to think of a single digit number from 1 to 9 inclusive and write it down. All those who wrote down a prime number are now asked to leave. Ninety people remain behind in the hall. How many of these are expected to have written down an odd number?
Hint: Remember that 1 is not a prime number.
Those that remain behind must have written {1,4,6,8,9} and from this only {1,9} are odd. The probability of an odd number is thus 2/5.
Expected number of odds is 2/5 * 90 = 36 Did you answer this riddle correctly?
YES NO
Expected number of odds is 2/5 * 90 = 36 Did you answer this riddle correctly?
YES NO
The Serial Killer Husband
A man kills his wife. Many people watch him doing so. Yet no one will ever be able to accuse him of murder. Why?
Hint:
The Safest Room
Hint:
They'd both be safe because the lions that havent eaten in 3 months would be dead. Did you answer this riddle correctly?
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White And Brittle
These are a part of your body
Sometimes theyre large, sometimes theyre little
Theyre white and they can be broken
And in some people they are brittle
What could these things be?
Sometimes theyre large, sometimes theyre little
Theyre white and they can be broken
And in some people they are brittle
What could these things be?
Hint:
Solve This
Hint:
Ask a question! Leave a note and we'll help you find the answer to any riddles it is you're looking to solve or help you with creating your own! Did you answer this riddle correctly?
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Solved: 44%
Sometimes Yellow Riddle
I follow a route but I'm not a mailman
I'm red in London but I'm not a telephone box
I'm sometimes yellow in the US but I'm not a taxi
I'm a mode of transport but I'm not a train
I have wheels that go round and round but I'm not a car
I'm red in London but I'm not a telephone box
I'm sometimes yellow in the US but I'm not a taxi
I'm a mode of transport but I'm not a train
I have wheels that go round and round but I'm not a car
Hint:
A Snowman's Breakfast Riddle
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Race Car Drivers Riddle
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Sea Monster Food Riddle
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Teasing Fruit Riddle
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Scared Food Riddle
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Breakfast For Trees
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Skipper Breakfast Riddle
Hint:
A Queen's Twins Riddle
A Queen has twins by Caesarean section so it's impossible to tell who was born first. Now the twins are adults and ready to rule. One is intensely stupid, while the other is highly intelligent, well loved and charismatic. Yet the unintelligent one is chosen as the next ruler.
Why?
Why?
Hint:
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