Question

What is the HCF of 16, 72 and 28?

• A. 3
• B. 4
• C. 2
• D. 1

Answer 1

Answer:

B. 4

Factorisation Method:

$16=2\times{2}\times{2}\times{2}$

$72=2\times{2}\times{2}\times{3}\times{3}$

$28=2\times{2}\times{7}$

$HCF=2\times{2}=4$