In an examination, $65\%$ of the total examinees passed. If the number of failures is $420$, the total number of examinees is _____.

In an examination, a student scored $30\%$ marks in the first paper out of a total of $180$. How much should he score on the second paper out of a total of $150$, if he is to get an overall average of at least $50\%$?

In an examination, it is required to get $36\%$ of maximum marks to pass. A student got $113$ marks and was declared failed by $85$ marks. The maximum marks are _____.

Out of $100$ students, $50$ failed in English and $30$ in Mathematics. If $12$students failed in both English and Mathematics, then the number of students who passed in both the subjects is _____.

In school, $40\%$ of the students play football and $50\%$ play cricket. If $18\%$ of the students play neither football nor cricket, the percentage of students playing both is _____.

The population of a district is $296000$ out of which $166000$ are men. $50\%$ of the total population consists of literates. If $70\%$ of the men are literate, how many women are illiterate?

In a school, $\frac{1}{5}\mathrm{th}$ of girls and $\frac{1}{4}\mathrm{th}$ of boys are less than $12$years of age. If there are $1000$ students in the school and$\frac{2}{5}\mathrm{th}$ of them are girls, then what percentage of students are $12$ years or more in age?

$605$ toffees are equally distributed among some children in such a way that each child gets toffees equal to $20\%$ of the number of all children. How many toffees does each child get?

On increasing the tax on a commodity by $20\%$, its consumption is decreased by $20\%$. The effect on the revenue obtained is _____.