Embibe Experts Solutions for Chapter: Arithmetical Reasoning, Exercise 1: MAT 2020

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?

In an examination students are graded with four grades namely $A, B, C$ and $D$ and $72$ students of the school secured $A$ grade. The ratio of students who secured $A$ grade to students with $D$ grade is $2:5.$ Out of the total students $30\%$ students secured $B$ grade and $40\%$ secured $C$ grade. What is the total number of students in the school?

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?

Which number will take the position of '?'?

Find the missing value:

There are three paths from A to B each consists of one or more semi-circles of unknown radii. The paths AXB, AYB, AZB are called I, II and III respectively. Which of the following is true?

You have got a compass and a straight-edge (un-marked ruler). Each time you use compass (to draw an arc) you have to pay $₹20$ and for using ruler (to draw line) you have to pay $₹1$. If you have got $₹1000$ to spend (on these) what is the maximum number of pairs of perpendicular lines you can construct?