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?

The population of a city increases at the rate of $5 \%$ per annum. If the present population of the city is $3,70,440$,its population $3$ years ago was:

If $35 \%$ of $A$'s income is equal to $25 \%$ of $B$'s income,then the ratio of $A$'s income to $B$'s income is

From a container having pure milk,$20 \%$ is replaced by water and the process is repeated thrice. At the end of the third operation,the milk is: (in $\%$ pure)

If the price of a shirt is increased by $25 \%$ and then decreased by $30 \%$,then what will be the net effect?

In an examination,$5 \%$ of the applicants were found ineligible and $85 \%$ of the eligible candidates belonged to the general category. If $4275$ eligible candidates belonged to other categories,then how many candidates applied for the examination?