Question

Among the following numbers, which number is divisible by $7$?

• A. $654$
• B. $672$
• C. $542$
• D. $321$

Answer 1

The correct option is B $672$

We know the divisibility rule for $7$:
If you double the last digit and subtract it from the rest of the number and the answer is $0$ or divisible by $7$.
Here, $672$ is divisible by $7$.
When we double the last digit it will become, $674$.

Then subtract the last digit number $4$ from $67$, we get $67-4=63$, is divisible by $7$.

So, option B is correct.