DELHI POLICE CONSTABLE MATHS QUIZ 1

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Question 1:

During a car race Jeff Gordon increase his speed by 16.67% than the usual speed. to win the race this time in this case is how much % less than the usual time.

Question 2:

In a rectangle, the length is $3 \mathrm{~cm}$ more than its breadth and the area of rectangle is $180 \mathrm{~cm}^{2}$. If a square is made by taking the breadth of rectangle as its side. Then find the perimeter of square.

Question 3:

Kishore sold two articles at Rs. 795 each. At the 1st article he gets $32.5 \%$ profit, but he sold the 2nd article in such a way that he would get overall neither profit nor loss. Then find the difference between the CP of both articles?

Question 4:

Two pipes $\mathrm{P}$ and $\mathrm{Q}$ are inlet and outlet pipes respectively where Pipe P can fill the tank in 8 hours and Pipe $Q$ can empty the full tank in 5 hours. If $\frac{3}{4}$ th part of the tank are already filled by water and both pipes are opened together then find in how many hours tank will empty?

Question 5:

If the ratio of difference between compound interest and simple interest for 3 years to the difference, between compound interest and simple interest for 2 years is 17 $: 5$, then find the rate of interest?

Question 6:

If the price of electricity is decreased by $20 \%$ and Varun decides to spend $10 \%$ less on electricity, then by how much % does his consumption get affected?

Question 7:

In what ratio should oil costing Rs. 90 per liter be mixed with oil costing Rs. 118 per liter, so that on selling the resultant solution at Rs. 128 per liter, the shopkeeper gains $14 \frac{2}{7} \%$ ?

Question 8:

The average score (runs/match) of Kohli before the start of World Cup was 35 . In the world cup of 6 matches, his total score was 360 runs. Find the total number of matches played by him till date, if his new average after the series is $40$.

Question 9:

$22-[23-\{24-(27-\overline{25-30})\}]=?$

Question 10:

The remainder, when $17^{37}+29^{37}$ is divided by 23 is: