Famous Riddles

Some of the most famous riddles in the world. They’ve been passed down for generations, and are renowned for their ingenuity and universal appeal.

Probability Other Child Is a Boy

Mr. Smith has two children. If the older child is a boy, what is the probability that the other child is also a boy?

Riddle Answer

28 Handshakes

There was a small get-together. There were a total of 28 handshakes exchanged between the guests. How many guests were present?

Riddle Answer

Biggest Number with Four Ones

Can you name the largest number that can be written with four 1’s?

Riddle Answer

Probability That Both Children Are Boys

Mr. Smith has two children. At least one of them is a boy. What is the probability that both children are boys?

Riddle Answer

Adding up to 15

How can you place the numbers 1 through 9 in a 3×3 grid such that every row, column, and the two diagonals all add up to 15?

Riddle Answer