Question

Find the sum of the common prime factors of 168
and 315.
A. 10
B. 7
C. 3
D. 9​

Answer 1

Answer:

The sum of the common prime factors is 10 as the common prime factors of 315 and 168 are 3 and 7.

Answer 2

The sum of the common prime factors of 168 and 315 is "Option (A) 10".

Step-by-step explanation:

we have,

168 and 315

The prime factor 168 = 2, 2, 2, 3 and 7.

Also,

The prime factor 315 = 3, 3, 5 and 7.

∴  The common prime factors of 168  and 315 = 3 and 7

∴ The sum of the common prime factors of 168 and 315

= 3 + 7 = 10

Hence, the sum of the common prime factors of 168 and 315 is option (A) 10.