Question

what is the h.c.f. of 15,30 and 90​

Answer 1

Factorst of

15= 3 x 5

30= 3 x 5 x 2

90= 3 x 5 x 2 x 3

Now the common factors are 3 and 5 .i.e. 15

therefore HCF of 15,30,90 is 15

Answer 2

Step-by-step explanation:

$15 = 3 \times 5\\ 30 = 5 \times 6\\ 90 = 5 \times 3×5×2 ×3$

$so \: hcf \: is \: 15$