Question

find the HCF of 12,90,120??​

Answer 1

Answer:

Factors of 12 = 1, 2, 3, 4, 6 and 12. Factors of 18 = 1, 2, 3, 6, 9 and 18. Therefore, common factor of 12 and 18 = 1, 2, 3 and 6. Highest common factor (H.C.F) of 12 and 18 = 6 [since 6 is the highest common factor].

90 = 3 x 3 x 2 x 5. H.C.F( 90, 144) = 2 x 3 x 3 = 18.

Answer 2

Answer:

Factors of 12 = 1, 2, 3, 4, 6

Factors of 90 = 1,2,3,5,6,9,10,15,18,30,45,90

Factors of 120 = 1,2,3,4,5,6,8,10,12,15,20,24,30,40,60,120

H.C.F of 12,90 and 120 = 6