In a class $20\%$ of students are below $14$ years of age. Out of the remaining students $10\%$ are of the age $14-15$ years and ratio of students who are between $15-16$ years of age to student above $16$ years of age is $3:2$. If the number of students who are above $16$ years is $72$, what is the total number of students in the class?

Find the values of W, X, Y and Z in the given figure sum of numbers vertically, horizontally and diagonally is equal $45$.

The yearly percentage expenditure of a school student on various items is shown in table given below:

$\begin{array}{|lc|}\hline \text{ Items }& \text{ Expenditure }\\ \text{ Books }& 30\\ \text{ Note Books }& 10\\ \text{ School fee }& 20\\ \mathrm{Mess} \mathrm{charges}& 5\\ \mathrm{Travel} \mathrm{and} \mathrm{accomodation}& 35\\ \hline\end{array}$

Which of the following figures represent the above data?

The ratio of boys and girls in a school for the last five academic years are given in the following graph. If the number of girls in $2016-17$ is half of that in $2017-18$, what is the ratio of boys in $2017-18$ to boys in $2016-17?$

A manufacturer of tennis balls is claimed that their balls are the best as it (a ball) would rise constantly $10\%$ of the height from which it was dropped.

If the ball is dropped from $27$ feet, how much approximately in feet the ball travels (in feet) before coming to rest?

Aman is six years elder than Ayaz.

Ayaz is eight years elder than Ashwinder.

The sum of the present ages of Aman and Ayaz is five times the age of Ashwinder four years ago.

Then the present age of Aman is :

In an extension of a city, the total population is $3000$. The distribution of the population of $3000$ people is as follows:

$1.$ Equal number of men and women are there in the age group of above $60$ years.

$2.$ Number of male and female below $60$ years are $1250$ and $1150$ respectively.

$3.$ Number of boys and girls below $18$ years are $240$ and $220$ respectively.

What is the difference between the female population of above $60$ years and the adult female population below $60$ years in the extension?