Question

H.c.f of 12,18and 20

Answer 1

This method is like L.C.M
Now to solve it, you keep dividing with numbers that can divide the 3 of them at the same time
If the number can’t divide the 3 of them, you stop because if you use a number to divide just two of it it’s then L.C.M not H.C.F

Answer 2

Explanation:

To find the HCF (highest common factor) of 12, 18 and 20, we can use the prime factorization method:

First, we write each number as a product of its prime factors:

12 = 2 × 2 × 3

18 = 2 × 3 × 3

20 = 2 × 2 × 5

Next, we identify the common prime factors and their lowest powers. In this case, the only common prime factor is 2, and it appears with a power of 2 in the factorization of 12 and 20, but with a power of 1 in the factorization of 18. Therefore, the HCF of 12, 18 and 20 is:

HCF = 2 × 2 = 4

So, the HCF of 12, 18 and 20 is 4.