percentage, ratio and proportion, square roots - One Line Questions

1. What is the square root of 0.000009? — 0.003
2. Find the square root of 0.000144. — 0.012
3. What is the square root of 1.69? — 1.3
4. If a number is increased by 25% and then decreased by 25%, what is the net percentage change? — 6.25% decrease
5. If a number is increased by 20% and then decreased by 20%, what is the net percentage change? — 4% decrease
6. The ratio of two numbers is 3:4. If the first number is increased by 10% and the second number is decreased by 20%, what is the new ratio? — 1:1
7. What is the square root of 1/16? — 1/4
8. If a number is first increased by 10% and then decreased by 10%, the final number is: — 1% less than the original
9. What is the square root of 144? — 12
10. What is the square root of 10000? — 100
11. The ratio of the ages of A and B is 3:4. After 10 years, the ratio of their ages will be 4:5. What is the current age of A? — 20 years
12. What is the square root of 100/9? — 10/3
13. If a number is increased by 25%, it becomes 125. What is the original number? — 100
14. If 75% of a number is 90, find the number. — 120
15. The square root of 15625 is: — 125
16. The ratio of the number of boys and girls in a competition is 9:7. If there are 112 girls, how many boys are there? — 144
17. The ratio of boys to girls in a class is 4:3. If there are 24 boys, how many girls are there? — 18
18. If 60% of a number is 120, what is the number? — 200
19. Find the square root of 441. — 21
20. A number is decreased by 15%. If the new number is 170, what is the original number? — 200
21. The ratio of two numbers is 2:3. If the sum of the numbers is 50, what are the numbers? — 20 and 30
22. In an election, candidate A got 40% of the total votes. If he lost by 500 votes, what is the total number of votes polled? — 2500
23. The ratio of two positive integers is 3:7 and their product is 1323. Find the integers. — 27 and 63
24. Find the square root of 576. — 24
25. If 40% of a number is 200, what is 60% of the same number? — 300
26. The ratio of the number of men and women in a factory is 3:2. If the total number of workers is 450, how many men are there? — 270
27. Find the square root of (12.25 * 4). — 7
28. What is the square root of 1024? — 32
29. Find the square root of 1296. — 36
30. The ratio of two numbers is 5:6. If 3 is added to both numbers, the ratio becomes 6:7. What is the sum of the original numbers? — 55
31. The ratio of two numbers is 5:8. If 7 is subtracted from the first number and 4 is added to the second number, the ratio becomes 4:8. Find the numbers. — 35 and 56
32. If the ratio of the ages of Ram and Shyam is 5:7 and the sum of their ages is 84 years, what is Shyam's current age? — 49 years
33. If 20% of the students in a class are girls, and the number of boys is 32, how many students are there in the class? — 40
34. The ratio of two numbers is 3:5. If 10 is added to each number, the new ratio becomes 5:7. What is the sum of the original numbers? — 40
35. In a class, 30% of students failed in Science, 25% failed in Maths, and 10% failed in both. What percentage of students passed in both subjects? — 55%
36. Find the square root of 30.25. — 5.5
37. If the price of an article is decreased by 25% and then increased by 20%, what is the net percentage change? — 10% decrease
38. A student scored 45% marks in an exam but failed by 10 marks. If the passing percentage is 55%, what is the maximum marks? — 100
39. The ratio of the speeds of two trains is 5:6. If the first train covers 250 km in 5 hours, what is the speed of the second train? — 60 km/hr
40. The ratio of the number of boys and girls in a school is 7:5. If the total number of students is 1200, find the number of girls. — 500
41. Find the square root of 3600. — 60
42. The ratio of two quantities is 5:3. If the first quantity is increased by 20% and the second quantity is decreased by 10%, what is the new ratio? — 6:2.7
43. The ratio of the number of apples to oranges in a basket is 11:13. If there are 55 apples, how many oranges are there? — 65
44. Two numbers are in the ratio 7:11. If the difference between the numbers is 24, find the larger number. — 77
45. What is the square root of 5329? — 73
46. What is the square root of (64 * 81)? — 72
47. A number is increased by 20% and then decreased by 10%. What is the net percentage change? — 8% increase
48. A number is increased by 10%. By what percentage should it be decreased to get the original number back? — 9.09%
49. A man's salary was increased by 20%. If his new salary is Rs. 24,000, what was his original salary? — Rs. 20,000
50. A decrease of 10% in the price of an item allows a person to buy 2 kg more for Rs. 360. What is the original price per kg? — Rs. 18/kg
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