DELHI POLICE QUANT QUIZ-9

Savita decides to donate 8% of her monthly income to a charitable trust. On the day of charity she changes her decision and donates an amount of ₹ 2,880 which is 20% less than the amount already earmarked for charity. What is his monthly income (in ₹)?

The price of an article is marked 20% above its cost price. If the shopkeeper makes a profit of $8 \%$ even after giving discount $\mathrm{x} \%$, then find the value of $x$.

The average of 51 numbers is 52. The average of the first 28 numbers is $50.5$ and the average of the last 24 numbers is $54.5$. If 28th number is dropped, then what will be the average of the remaining numbers?

A sum of ₹ 8,000 amounts to ₹ 13,824 in 3 years at $R \%$ p.a., interest compounded annually. What will it amount to in $1 \frac{1}{4}$ years at the same rate, if the interest is compounded half-yearly?

P started a business with Rs. 80000 and after some months Q joined with Rs. 60000 . If the profit at the end of the year was divided in the ratio $2: 1$, then after how many months did $Q$ joined the business?

If in 3 years a sum of ₹ 1,900 becomes ₹ 2,100 at a certain rate of simple interest, then in 5 years at the same rate of interest ₹ 11,400 will become?

$\mathrm{A}$ and $\mathrm{B}$ can do a piece of work in 12 days and 20 days respectively. They both work together for 6 days. The remaining work is completed by $C$ alone in 12 days. In how many days will $A$ and $C$ together complete the $\frac{2}{3}$ part of the work?

What least number should be subtracted from 2983 so that the resulting number when divided by 9,10 and 15 , the remainder in each case is 3 ?

A hollow iron pipe is $14 \mathrm{~cm}$ long and its outer diameter is $6 \mathrm{~cm}$. If the thickness of the pipe is $1 \mathrm{~cm}$ and the weight of iron is $8 \mathrm{~g} / \mathrm{cm}^{3}$, then the weight of the pipe ( in $\mathrm{Kg}$) how much? Use $\left(\pi=\frac{22}{7}\right.$ )

The value of $\frac{7}{8} \div 4 \frac{2}{3}$ of $1 \frac{1}{4}-1 \frac{1}{4} \times 1 \frac{1}{5}+(0 . \overline{53} \div 0.5 \overline{8}) \times 2 \frac{3}{4}$ is: