If $1$ billion is divided by $1$ crore, how many zeros are there in the remainder?
 

The correct option is (A),
Given $1$ billion which is the same as $100$ crores in the Indian number system i.e.

$1,00,00,00,000$ there are $9$ zeros.

Given 1 crore i.e.

$1,00,00,000$ there are 7 zeros.

We have to find the remainder when $1$ billion is divided by $1$ crore
When $9$ zeros are divided by $7$ zeros, $2$ zeros are left.
Therefore, the remainder of the division of $1$ billion by $1$ crore is $2$ zeros.