Question

Find the common factors of :
a) $4,8$ and $12$
b) $5,15$ and $25$

Answer 1

A) The factors of $4$ are $1,2,4$

The factors of $8$ are $1,2,4,8$

The factors of $12$ are $1,2,3,4,6,12$

Therefore, the common factors are $1,2,4$

B) The factors of $5$ are $1,5$

The factors of $15$ are $1,3,5,15$

The factors of $25$ are $1,5,25$

Therefore, the common factors are $1,5$