Question

Find the highest common factor of 18, 42 ,90

Answer 1

Answer:

6

Step-by-step explanation:

18 : 2×3×3

42 : 2×3×7

90 : 3×3×2×5

So the common one's we see here is 2 and 3 , multiply it which is 6 , hence the answer is 6

Answer 2

$Find \: the \: highest \: commo n \: factor \: of \: 18, 42 ,90 ? \\ \\ = > factor \: of \: 18 = 2 \times 3 \times 3 \\ \\ = > factor \: of \: 42 = > 2 \times 3 \times 7 \\ \\ = > factor \: of \:90 = 2 \times 3 \times 3 \times 5 \\ \\ = > hcf \: (common \: numbers \: of \: all \: factors \: of \: numbers) = 2 \times 3 \\ \\ = > hence , \: hcf = 6$