Question

One of these numbers is both a square number and a factor of 63. Choose the correct answer.

answers ;

3
21
9
16
17

Answer 1

Answer:

63 = 1 x 63, 3 x 21, or 7 x 9. Factors of 63: 1, 3, 7, 9, 21, 63. Prime factorization: 63 = 3 x 3 x 7, which can also be written 63 = 3² x 7.