Refresher Questions for Exam Preparation (Set – 39)
Mathematics & Mental Ability
1. A car travels 90 km in 1.5 hours. What is its speed in km/hr? Answer: 60 km/hr
2. Convert 72 km/hr into m/sec. Answer: 20 m/sec
3. If 12 men can do a work in 20 days, how many days for 15 men? Answer: 16 days
4. Find the Simple Interest on Rs. 5,000 at 10% for 2 years. Answer: Rs. 1,000
5. What is the average of 10, 20, 30, 40, and 50? Answer: 30
6. A man buys an item for Rs. 80 and sells for Rs. 100. Profit %? Answer: 25%
7. If 20% of a number is 80, what is the number? Answer: 400
8. Find the HCF of 12, 18, and 24. Answer: 6
9. What is the perimeter of a rectangle with length 10cm and breadth 5cm? Answer: 30 cm
10. Find the LCM of 5, 10, and 15. Answer: 30
11. Simplify: (25 x 4) + (50 / 2) - 10. Answer: 115
12. A shopkeeper sells a watch for Rs. 540 at a 10% loss. Cost price? Answer: Rs. 600
13. Find the square root of 625. Answer: 25
14. If the ratio of two numbers is 3:4 and sum is 70, find the numbers. Answer: 30 and 40
15. What is the sum of angles in a triangle? Answer: 180 degrees
16. Find the area of a circle with radius 7 cm. Answer: 154 sq. cm
17. What is the square of 15? Answer: 225
18. A sum of money doubles in 8 years at simple interest. Rate %? Answer: 12.5%
19. What is the value of 0.05 x 0.5? Answer: 0.025
20. Average of first five prime numbers? Answer: 5.6
21. A train 100m long passes a pole in 5 seconds. Speed? Answer: 20 m/sec
22. If 5 kg sugar costs Rs. 200, find 12 kg cost. Answer: Rs. 480
23. What is 15% of 200? Answer: 30
24. A and B can do a work in 10 and 15 days. Together? Answer: 6 days
25. The ratio of boys and girls is 5:3. Total students 80. Girls? Answer: 30
26. Find the median of 3, 5, 7, 9, 11. Answer: 7
27. What is the third proportional to 4 and 6? Answer: 9
28. An article cost Rs. 500, sold at 20% profit. Selling price? Answer: Rs. 600
29. Find the diagonal of a square with side 5cm. Answer: 5√2 cm
30. What is the value of 2 to the power 5? Answer: 32
31. Average of first ten natural numbers? Answer: 5.5
32. A cycle is sold for Rs. 1120 at a 40% profit. CP? Answer: Rs. 800
33. 10% of 20% of 100 is? Answer: 2
34. Find the surface area of a cube with side 3cm. Answer: 54 sq. cm
35. Convert 0.75 into a fraction. Answer: 3/4
36. Difference between largest 3-digit and smallest 3-digit number? Answer: 899
37. What is the value of (1/2) + (1/4)? Answer: 3/4
38. If x + 5 = 12, then x = ? Answer: 7
39. Number of dots on opposite faces of a dice sum to? Answer: 7
40. How many triangles are in a square with both diagonals drawn? Answer: 8
41. Identify the missing number: 2, 6, 12, 20, ? Answer: 30
42. In a row of 20, Raj is 8th from left. Right position? Answer: 13th
43. A mirror image of "APPLE" is? Answer: ELPPA (reversed characters)
44. Identify the odd one: 2, 3, 5, 9. Answer: 9 (not prime)
45. What is the angle between clock hands at 3:00? Answer: 90 degrees
46. Find the fourth proportional to 2, 3, 4. Answer: 6
47. A man walks 3km North, then 4km East. Distance from start? Answer: 5 km
48. How many seconds in 2 hours? Answer: 7,200
49. 0.1 + 0.01 + 0.001 = ? Answer: 0.111
50. Area of a rectangle is 50, length is 10. Breadth? Answer: 5
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