Question

Which of the following is a common factor for $15xy,25xyz$ and $35yz$.

• A. $5xy$
• B. $5y$
• C. $5xyz$
• D. $15xyz$

Answer 1

The correct option is B $5y$

$15xy=3\times 5\times x\times y$
$25xyz=5\times 5\times x\times y\times z$
$35yz=5\times 7\times y\times z$
$\therefore 5\times y=5y$ is a common factor for $15xy,25xyz,35yz$

So, option B is correct.