Math Riddles for April Fools' Day

Front

What has keys but can't open locks?

Back

A piano

Front

I am an odd number. Take away one letter and I become even. What number am I?

Back

seven

Front

If two's company and three's a crowd, what are four and five?

Back

a party

Front

What is the only number that is spelled with the same number of letters as its value? Options: five, three, six, four

Back

four

Front

I am a three-digit number. My tens digit is five more than my units digit. My hundreds digit is eight less than my tens digit. What number am I?

Back

194

Front

What comes once in a minute, twice in a moment, but never in a thousand years?

Back

the letter 'm'

Front

If you multiply this number by any other number, the answer will always be the same. What number is it?

Back

0

Front

What has a face and two hands but no arms or legs?

Back

A clock

Front

I am a number that is half of a dozen. What number am I?

Back

6

Front

What is full of holes but still holds water?

Back

A sponge