Question

The common factors of $20$ and $28$ are $1,2$and ………… .

Answer 1

The common factors are the factors that are common between the given numbers.

Since factors of $20=1,2,4,5,10,20$

Factors of $24=1,2,4,6,12,24$

Hence, common factors of $20$ and $24$are $1,2$ and $4.$