14. 42 = 2 x 3 x 7 98 = 2 x 72 hcf = 2 x 7 = 14
42/3 = 14 x 7 = 98 - 5 = 93
42/98 = 3/7
3/7
1 x 98 = 98 2 x 98 = 196 3 x 98 = 294 4 x 98 = 392 5 x 98 = 490 6 x 98 = 588 7 x 98 = 686 8 x 98 = 784 9 x 98 = 882 10 x 98 = 980 11 x 98 = 1078 12 x 98 = 1176
7 because: 7 x 4 = 28 7 x 6 = 42 7 x 14 = 98
The Greatest Common Factor of 154, 98, 42: 1414 (x 7, x 3 and x 11)
14. 42 = 2 x 3 x 7 98 = 2 x 72 hcf = 2 x 7 = 14
2 x 7 = 14 2 x 3 x 7 = 42 2 x 7 x 7 = 98 2 x 3 x 7 x 7 = 294, the LCM
Factor them. 2 x 3 x 7 = 42 2 x 7 x 7 = 98 Combine the factors, eliminating duplicates. 2 x 3 x 7 x 7 = 294, the LCM
The GCF is 14.hcf(42, 56, 98) = 1442 = 2 x 3 x 756 = 23 x 798 = 2 x 72hcf = 2 x 7 = 14
1, 2, 3, 6, 7, 14, 21, 42, 49, 98, 147, 294: 1 x 294, 2 x 147, 3 x 98, 6 x 49, 7 x 42, 14 x 21
1 x 294, 2 x 147, 3 x 98, 6 x 49, 7 x 42, 14 x 21, 21 x 14, 42 x 7, 49 x 6, 98 x 3, 147 x 2, 294 x 1
LCM of 98 and 42 is 294.
42/3 = 14 x 7 = 98 - 5 = 93
42/98 = 3/7
It is: 14