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
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
35. The difference between successive terms increases by 1: 5 + 6 = 11 11 + 7 = 18 18 + 8 = 26 ⇒ 26 + 9 = 35
170
21 and 5
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
It is the multiplication result of 26 and 21 as they don't have any common number.
1, 3, 7, 21 1, 2, 11, 22 1, 2, 3, 4, 6, 8, 12, 24 1, 5, 25
21 and 5