Question

What is the missing digit which makes the number 121_ exactly divisible by $4$?

• A. 1
• B. 2
• C. 3
• D. 5

Answer 1

The correct option is B 2

We know the divisibility rule for $4$:
Check the last two digits are a multiple of $4$ or if the last two digits are $00$
From the given options if we select option B, Then the number becomes $1212$, whose last two digits are $12$.

As $12$ is divisible by $4$, number $1,212$ is divisible by $4$.

Hence option $B$ is correct.