There are $1400$ students in the school. $25 \%$ of them wear spectacles and $\frac{2}{7}$ of those who wear spectacles are boys. How many girls in the school wear spectacles?

Of the $1000$ inhabitants of a town,$60 \%$ are males of whom $20 \%$ are literate. If,of all the inhabitants,$25 \%$ are literate,then what per cent of the females of the town are literate (in $.5$)?

$40 \%$ of $? = 240$

Ramesh loses $20 \%$ of his pocket money. After spending $25 \%$ of the remainder,he has $₹ 480$ left. What was his pocket money?

The quantity of water needed to reduce $9 \ ml$ of shaving lotion containing $50 \%$ alcohol to a lotion containing $30 \%$ alcohol is: (in $ml$)

If $25 \%$ of a number is $6$,what is the number that is $50 \%$ more than the initial number?