Number Riddles

Number riddles are brain teasers that use clues about numbers. They make you think about math in creative ways. Solving them feels great because you have to use logic, math facts, and sometimes a little trick thinking.

Types of Number Riddles

Some riddles describe a number with clues. For example: I am a two-digit number. My digits add up to 9. I am less than 50. My tens digit is bigger than my ones digit. What number am I? The answer is 81, wait, let us check: 8 plus 1 is 9, it is less than 50... actually, it is 72!

Other riddles are tricky word problems. They sound simple but have a twist that catches you off guard.

Making Your Own

You can create your own number riddles. Pick a number. Think of facts about it. How many digits does it have? Is it even or odd? What do its digits add up to? Write clues that lead to only one answer.

Sharing riddles with friends makes math social and fun. You can even have riddle competitions to see who solves them fastest.

Fun Facts

• The ancient Sphinx in Greek mythology asked a famous riddle, though it was not about numbers.
• Some number riddles have been passed down for hundreds of years.
• Riddles help improve your critical thinking and problem-solving skills.

Did You Know?

Here is a classic number riddle: if you have me, you want to share me. If you share me, you no longer have me. What am I? A secret! Riddles are not always about math, but they always make you think.