1, 11
1, 2, 3, 6, 9, 18
1, 3, 7, 21
1, 2, 13, 26
1, 3, 9, 27
Factors of 18: 1, 2, 3, 6, 9 and 18. Factors of 26: 1, 2, 13 and 26.
Factors of 26: 1, 2, 13, 26 Factors of 18: 1, 2, 3, 6, 9, 18 GCF (26, 18) = 2
The only common factor of 21 and 26 is 1.
26 - (18/3) + (9/9) = 26 - 6 + 1 = 21
35. The difference between successive terms increases by 1: 5 + 6 = 11 11 + 7 = 18 18 + 8 = 26 ⇒ 26 + 9 = 35
The factors of 26 are: 1, 2, 13, 26 The factors of 42 are: 1, 2, 3, 6, 7, 14, 21, 42 The factors of 63 are: 1, 3, 7, 9, 21, 63
170
21 and 5
It is the multiplication result of 26 and 21 as they don't have any common number.
The factors of 18 are: 1, 2, 3, 6, 9, 18 The factors of 26 are: 1, 2, 13, 26 The factors of 40 are: 1, 2, 4, 5, 8, 10, 20, 40 The factors of 81 are: 1, 3, 9, 27, 81
1, 3, 7, 21 1, 2, 11, 22 1, 2, 3, 4, 6, 8, 12, 24 1, 5, 25
21 and 5