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

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

20 Percent off Sale Price

If the price off a dress was cut by 20% for a sale, by what percentage off the sale price must it be increased by to resell it at the original price?

Riddle Answer

4400 Days from Today

If today is Sunday, what day of the week will it be 4400 days from today?

Riddle Answer