Question

In which of the following is the first number not a factor of the second number

• A. $4,76$
• B. $12,136$
• C. $15,495$
• D. $18,918$

Answer 1

The correct option is B

$12,136$

Explanation for correct option

(b) $12$ and $136$.

$136$ is not completely divisible by $12$.

We get a remainder of $4$.

Hence $12$ is not a factor of $136$.

Explanation for incorrect options

(a) $4$ and $76$.

$76$ is completely divisible by $4$.

Hence $4$ is a factor of $76$.

(c) $15\mathrm{and}495$.

$495$ is completely divisible by $15$.

Hence $15$ is a factor of $495$.

(d) $18$ and $918$.

$918$ is completely divisible by $18$.

Hence $18$ is a factor of $918$

Hence option (B) is the correct answer.