Suppose 8 monkeys take 8 minutes to eat 8 bananas. How many minutes would it take 3 monkeys to eat 3 bananas? How many monkeys would it take to eat 48 bananas in 48 minutes?
Riddle AnswerMath Riddles
10 Digit Number
Find a 10 digit number where the first digit (most significant digit) indicates how many zeros are in the number, the second digit indicates how many 1s are in the number etc. till the tenth digit which indicates how many 9s are in the number.
Riddle AnswerCheryl’s Birthday
Albert and Bernard became friends with Cheryl, and they want to know when her birthday is. Cheryl gives them a list of 10 possible dates.
May 15 May 16 May 19 June 17 June 18 July 14 July 16 Aug 14 Aug 15 Aug 17
Cheryl then tells Albert and Bernard separately the month and the day of her birthday respectively.
Albert: I don’t know when Cheryl’s birthday is, but I know that Bernard does not know too.
Bernard: At first I don’t know when Cheryl’s birthday is, but I know now.
Albert: Then I also know when Cheryl’s birthday is.
When is Cheryl’s birthday?
Riddle AnswerTrain to Dacha
Two schoolgirls were traveling from the city to a dacha (summer cottage) on an electric train.
“I notice,” one of the girls said, “that the dacha trains coming in the opposite direction pass us every 5 minutes. What do you think-how many dacha trains arrive in the city in an hour, given equal speeds in both directions?”
“Twelve, of course,” the other girl answered, “because 60 divided by 5 equals 12.”
The first girl did not agree. What do you think?
Riddle AnswerWeighing 9 Balls
There are 9 balls that are identical. Only one ball is heavier than the rest. You also have a two-armed scale with which to measure the weight of the balls. How can you find the heavier ball by using the scale only twice?
Riddle Answer