Question

If $A=3\times 5$ and $B=7\times 11$, then how many factors does $A\times B$ have ?

• A. 4
• B. 1155
• C. 2
• D. 16

Answer 1

The correct option is D 16

Given that $A=3\times 5$ and $B=7\times 11$.
$⟹A\times B=3\times 5\times 7\times 11$.
Thus, $A\times B$ has $(1+1)(1+1)(1+1)(1+1)=16$ factors in all.