3 x 15 = 45
3
17
8
33 x 3 = 99
3 times 8 = 24
3 x 19 = 57
3 x 17 = 51
51/3 which is 17
21 x 3 = 63
3 x 8 = 24
Yes, 3 is a factor of 45 because 45 is divisible by 3. 45 = 3 x 15 + 0.
None. 291 is not divisible by 7 and so you cant have a whole number factor pair with 7