Because 3 and 56 are factors of 168 168/3 = 56 56*3 = 168
The factors of 56 are: 1, 2, 4, 7, 8, 14, 28, and 56.The prime factors of 56 are: 2 and 7.The factors of 81 are: 1, 3, 9, 27, and 81.The only prime factor of 81 is: 3.
The factors of 56 are: 1, 2, 4, 7, 8, 14, 28, 56 The factors of 63 are: 1, 3, 7, 9, 21, 63
56: 2, 781: 3
The factors of 21 are: 1, 3, 7, 21The factors of 56 are: 1, 2, 4, 7, 8, 14, 28, 56
Prime factors of 42: 2, 3 and 7 Prime factors of 56: 2 and 7
The factors of 21 are: 1, 3, 7, 21. The factors of 56 are: 1, 2, 4, 7, 8, 14, 28, 56.
The factors of 56 are: 1, 2, 4, 7, 8, 14, 28, 56 The factors of 63 are: 1, 3, 7, 9, 21, 63 The factors of 81 are: 1, 3, 9, 27, 81
56 = 2^3*7 so the only odd factors (apart of 1) is 7.
It is: 2^3*7 = 56
For 36, 2 and 3 For 56, 2 and 7
21 factors to [3 7] 56 factors to [2 2 2 7] Common factors [7] Answer is 7 ■