# math

posted by
**phil**
.

three of these puzzles have more than one answer. try to find all the possible answers for each puzzle one of these puzzle is impossible.

1.my number is a factor of 20. it's also a factor of 30.

2. my number is a multiple of 10. it's a factor of 45.

3. my number is between 40 and 50. it's a prime.

4. my number is a multiple of 4. it's a square number. it's less than 50.