Question

What is the Hcf for 18 and 36

Answer 1

18

Explanation:

GCF - The highest number that divides into two or more numbers, we are given the number 18 and 36.

Out of all the numbers divisible by 18 and 36, 18 is the greatest number out of all, making it the GCF.

Answer 2

6

Explanation:

The HCF (highest common factor) is the product of all the primes of both numbers!

1) List the prime factors of 18...

18 = 2 × 3 × 3

2) List the prime factors of 36...

2 × 2 × 3 × 3

3) Now see what numbers are in both!

We can see that the numbers 2 & 3 are in both prime factors so all we need to do is multiply them...

• 2 × 3 = 6

Have a lovely day :)