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.
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