Question

How many different positive integers are factors of both $28$ and $42$?

• A. $1$
• B. $2$
• C. $3$
• D. $4$
• E. More than $4$

Answer 1

Answer: (D)

$4$

$4$ positive integers are factors of $28$ and $42$ both.
For example,
$1,4,7,6$ and $28$ itself is a factor of $28$.
$1,4,7,6$ and $42$ itself is factor of $42$.