Question

What is the value of $x$ such that $1281x$ is divisible by $8$?

• A. $4$
• B. $5$
• C. $6$
• D. $7$

Answer 1

The correct option is C $6$

We know the divisibility rule for $8$:
If the last three digits is divisible by $8$ or last three digits of the given number are zeros, then the number is divisible by $8$.
Here $12816$ is divisible by $8$, because the last three digits is divisible by $8$.
So, option C is correct.