Question

Guys help!

I got this when trying to find HCF of 18 & 60... is this possible? don't composite numbers only have one prime factorisation?

2 | 18 2 | 18
3 | 6 2 | 6
3 | 3 3 | 3
| 1 | 1

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Answer 1

Answer:

6 is the HCF.

Step-by-step explanation:

Factors of 18 = 2 * 3 * 3

Factors of 60 = 5 * 3 * 2 * 2

Thus the HCF is 2 * 3 = 6.