$88 \%$ of $370 + 24 \%$ of $210 - ? = 118$

Find a single equivalent increase,if a number is successively increased by $10 \%$,$20 \%$,and $25 \%$. (in $\%$)

In an examination,it is required to multiply a number by $7$,but by mistake,a student divides it by $7$. What is the error percentage?

The total population of a village is $5000$. The number of males and females increases by $10\%$ and $15\%$ respectively,and consequently,the population of the village becomes $5600$. What was the number of males in the village?

How many students passed in first class?
Statements:
$I$. $85 \%$ of the students who appeared in the examination have passed either in first class,second class,or pass class.
$II$. $750$ students have passed in second class.
$III$. The number of students who passed in pass class is $28 \%$ of those who passed in second class.

The number which exceeds $16 \%$ of it by $42$ is: