Question

Find the greatest common factor of 4 and 12 using prime factorization.

• A. 1
• B. 2
• C. 3
• D. 4

Answer 1

The correct option is D 4

Expanded form of 4 with prime factors = $\underset{–}{2}\times \underset{–}{2}$
Expanded form of 12 with prime factors = $\underset{–}{2}\times \underset{–}{2}\times 3$
Product of common factors = $2\times 2$
Hence, GCD = $4$