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 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?
YES NO
YES NO
A Metal Room With A Metal Door
A prisoner was stuck in a metal room with a metal door that was locked. There was no windows and nothing in the room but a piano. What can he do to escape?
Hint:
4 Girls Are In A Room
Hint:
Mark And Nancy Riddle
On a Saturday afternoon, the couple went out to a restaurant to celebrate their fifth anniversary together. Her when they returned in the evening, they found their son dead. There were three other people in the house at the time of the murder. The babysitter said she was ironing sams school uniform for tomorrow. The maid said she was cleaning the corners of the house and the chef said he was chopping vegetables for dinner. Youve been hired to investigate who killed Sam. So who did it?
Hint:
It can be the babysitter or the chef.
Explanation: Both of them are the culprit because if they went for dinner so why the chef is preparing dinner?
And the other is the babysitter because she was ironing the shirt for school tomorrow but it was a Saturday so the next day is Sunday. Did you answer this riddle correctly?
YES NO
Explanation: Both of them are the culprit because if they went for dinner so why the chef is preparing dinner?
And the other is the babysitter because she was ironing the shirt for school tomorrow but it was a Saturday so the next day is Sunday. Did you answer this riddle correctly?
YES NO
You Were In A Garden Riddle
Hint:
Firstly, the backyard and garden are the same. The answer is the same for both backyard and garden. As per the riddle, if you kill 30 people, the other 4 people escape from the garden. So 30 people are killed and 4 people escape from the backyard. Only the killer was left in the garden. Hence only 1 person was in the garden. Did you answer this riddle correctly?
YES NO
YES NO
Five Apples Riddle
Hint:
The fifth woman took the entire basket, with the apple still in it. Did you answer this riddle correctly?
YES NO
YES NO
A Word I Know Riddle
Hint:
Others Use It More Than You Riddle
Hint:
Twelve Pears Riddle
Twelve pears hanging high, twelve men passing by. Each took a pear and left eleven hanging there. How can this be?
Hint:
A Dime And A Penny Riddle
Hint:
An Even Number Riddle
I am an even number.I am more than 16. I am the next number in this pattern: 5, 10, 15, ___. What am I?
Hint:
I Am 5 Nickels Riddle
Hint:
I Am Even Riddle
Hint:
3 Tens And 1 One Riddle
Hint:
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