Question

Select the condition(s) which can be used to identify whether the given number is divisible by $10$ or not.

• A. The unit digit number should be zero.
• B. The number should be divisible by both $2$ and $5.$

Answer 1

Answer: (A), (B)

The number should be divisible by both $2$ and $5.$

When a number is multiplied by $10,$ its unit place digit becomes zero.

For example, $5\times 10=50$

$\therefore$ The unit digit number should be zero for the number to be divisible by $10.$

Also, $10=2\times 5.$
$\therefore$ Any number which is divisible by $10$ should be divisible by both $2$ and $5.$