Quantitative Aptitude

1. A shopkeeper earns a profit of 10% after allowing a discount of 20% on the marked price. The cost price of the article whose marked price is Rs. 880, is 

(1) Rs. 704

(2) Rs. 640

(3) Rs. 774

(4) Rs. 680

2. The equivalent single discount for two successive discounts of 15% and 10% is

(1) 25% 

(2) 20%

(3) 23.5%

(4) 20.5%

3. The marked price of a watch is Rs. 160. A customer buys it for Rs. 122.40 on two successive discounts. If the first discount is 10%, then the second discount is 

(1) 10%

(2) 12%

(3) 15%

(4) 18%

4. In 30 litres mixture of acid, the ratio of acid and water is 2 : 3. What amount of water should be added to the mixture so that the ratio of acid and water becomes 2 : 5?

(1) 10 litres

(2) 15 litres

(3) 18 litres

(4) 12 litres

5. If the sales tax on a television set increases form 71/2% to 8%, what more amount will have to be paid for the television whose price (excluding sales taxes) is Rs. 19000?

(1) Rs. 190

(2) Rs. 95

(3) Rs. 180

(4) Rs. 90

6. Two numbers are more than the third number by 20% and 50% respectively. Fist number is what per cent of the second number?

(1) 100%

(2) 150%

(3) 80%

(4) 120%

7. The ratio of the C.P. and S.P. of an article is 20 : 21. What is the gain per cent?

(1) 5%

(2) 5.5%

(3) 6%

(4) 6.25%

8. A man sells two pipes at Rs. 12 each. He gains 20% on one and loses 20% on the other. In the whole transaction, there is 

(1) neither loss nor gain 

(2) profit of Re.1

(3) loss Re. 1

(4) Profit of Rs. 2

9. A man sells 320 mangoes at the cost price of 400 mangoes. His gain per cent is

(1) 10%

(2) 15%

(3) 20%

(4) 25%

10. If the difference between the compound interest and simple interest on a sum at 5% rate of interest per annum for three years is Rs. 36.60, then the sum is 

(1) Rs. 8000

(2) Rs. 8400

(3) Rs. 4400

(4) Rs. 4800

Answers Key
1.(2)
2.(3)
3.(3)
4.(4)
5.(2)
6.(3)
7.(1)
8.(3)
9.(4)
10.(4)