Math Riddles

These Math Riddles are based on math concepts and can be solved with a bit of math and logic. These fun riddles can surely give you a tough time.

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

We have a brick of regular size. It weighs 4kg. How much do you think a similar brick, four times smaller, but made of the same material weigh?

Riddle Answer

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

Riddle Answer

What is wrong with the following proof?

2=1
a = b
a² = ab
a² – b² = ab – b²
(a+b)(a-b) = b(a-b)
a + b = b
2b = b
2 = 1

Riddle Answer

If it were two hours later, it would be half as long until midnight as it would be if it were an hour later. What time is it now?

Riddle Answer