RPH Editorial Team Solutions for Exercise 2: Numerical Ability

$\frac{3}{8}$th of the girls and $\frac{4}{9}$th of the boys of a primary school participated in the annual sports. If the number of participating students is $155$ out of which $92$ are boys, what is the total number of students in the primary school?

The total cost of painting a rectangular wall at $Rs. 110$ per $f{t}^2$ is $Rs. 10560$. The length of the wall is $4$ $ft$ more than the breadth of the wall. What is the length of the wall?

A dealer sold an article for $Rs. 6120$ at a loss of $15\%$. Had the dealer sold the article for $Rs. 1,728$ more, how much would have the dealer gained?

Javed invested equal sums in scheme A and B. Both the schemes offer same rate of interest i.e. $8\%$ per annum. The only difference in Scheme A offers compound interest (compund annually) and scheme B offers simple interest. If the difference between interests accured by Javed from both the schemes after $2$ years is $Rs. 53.76$, what sum was invested by him in each of the schemes?

Find the value of $?$ .

$\sqrt{\left(1764\right)}÷6+{?}^2÷16\times 21=196$

$125\%$ of $200+22\%$ of $350=?$

$\sqrt{\left(x\right)}+{19}^2={21}^2$

Simplify:

$\frac{4640}{145}\times \frac{656}{16}=?$