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.

100 Using Six Nines

How can you express the number 100 using six nines and no other digits?

Riddle Answer

$1.15 in Six Coins

A man has $1.15 in six coins. He can’t make change for a dollar, a half dollar, a quarter, a dime, or a nickel. What coins did he have?

Riddle Answer

Six Dozen Dozen

Which is greater: six dozen dozen or half a dozen dozen?

Riddle Answer

53 Socks

A man has 53 socks in his drawer: 21 identical blue, 15 identical black and 17 identical red. The lights are fused and he is completely in the dark. How many socks must he take out to be 100 percent certain he has a pair of black socks?

Riddle Answer

Half of 2+2

What is half of 2+2?

Riddle Answer