Question

what is the hcf of 15,30 and 45

Answer 1

Explanation:

Find the prime factors for each number as:

45=3×3×5

30=2×3×5

15=3×5

Now identify the common factors and determine the GCF

45=3×3×5

30=2×3×5

15=3×5

Therefore:

HCF=3×5=15