Question

The HCF of 45, 78 and 117 is:

• A. 9
• B. 7
• C. 5
• D. 3

Answer 1

Answer:

D. 3

Prime Factorization

$45=3^2\times5$

$78=2\times3\times13$

$117=3^2\times13$

The highest power of 3 common in all numbers is 3.