Simplification percentage highest common factor HCF and lowest common multiple LCM. - Question Bank

1. What is the LCM of 18 and 24?
A) 24
B) 36
C) 48
D) 72
2. Find the HCF of 16, 20, and 28.
A) 1
B) 2
C) 4
D) 8
3. What is 3/4 of 200?
A) 100
B) 120
C) 150
D) 175
4. Simplify: 80 / (4 * 5) + (10 - 2) * 3.
A) 28
B) 30
C) 32
D) 34
5. A number is 20% more than another number. By what percentage is the first number less than the second number?
A) 16.67%
B) 20%
C) 25%
D) 15%
6. What is the LCM of 14 and 21?
A) 21
B) 28
C) 42
D) 84
7. Find the HCF of 54 and 72.
A) 6
B) 9
C) 18
D) 27
8. What is the value of 12.5% as a fraction?
A) 1/4
B) 1/8
C) 1/10
D) 1/12
9. Simplify: 15 * [12 / (3 + 1) - 2].
A) 10
B) 15
C) 20
D) 30
10. If the price of an article is increased by 25% and then decreased by 20%, what is the net change in price?
A) 10% increase
B) 5% increase
C) No change
D) 5% decrease
11. What is the LCM of 9, 12, and 15?
A) 90
B) 120
C) 180
D) 360
12. Find the HCF of 18, 24, and 30.
A) 2
B) 3
C) 6
D) 12
13. What is 3/5 as a percentage?
A) 35%
B) 50%
C) 60%
D) 75%
14. Simplify: 60 + [40 - (5 * 4)] / 5.
A) 64
B) 68
C) 70
D) 72
15. A candidate needs 40% marks to pass an exam. If a student scores 200 marks but fails by 50 marks, what is the maximum marks for the exam?
A) 500
B) 550
C) 600
D) 625
16. Calculate the LCM of 5, 10, and 15.
A) 15
B) 30
C) 45
D) 60
17. Find the HCF of 210 and 330.
A) 10
B) 21
C) 30
D) 70
18. What is 250% of 40?
A) 80
B) 100
C) 120
D) 150
19. Simplify: 45 / (9 - 6) * 2 + 5.
A) 25
B) 30
C) 35
D) 40
20. If a number is decreased by 15%, it becomes 170. What is the original number?
A) 190
B) 195
C) 200
D) 205
21. What is the LCM of 12 and 18?
A) 18
B) 24
C) 36
D) 72
22. Find the HCF of 135 and 180.
A) 15
B) 30
C) 45
D) 90
23. What is 0.75 as a percentage?
A) 0.75%
B) 7.5%
C) 75%
D) 750%
24. Simplify: 100 - [50 + (20 * 3) - 10].
A) 10
B) 20
C) 30
D) 40
25. A man saves 15% of his income. If he saves Rs. 750 per month, what is his monthly income?
A) Rs. 4500
B) Rs. 5000
C) Rs. 5500
D) Rs. 6000
26. Calculate the LCM of 6, 8, and 10.
A) 40
B) 60
C) 80
D) 120
27. Find the HCF of 96 and 144.
A) 12
B) 16
C) 24
D) 48
28. What is 150% of 50?
A) 75
B) 100
C) 125
D) 150
29. Simplify: 72 / (6 * 2) + 10 - 3.
A) 13
B) 10
C) 16
D) 19
30. If 60% of a number is 300, what is the number?
A) 450
B) 500
C) 550
D) 600
31. What is the LCM of 7 and 9?
A) 16
B) 21
C) 63
D) 126
32. Find the HCF of 105 and 140.
A) 5
B) 7
C) 35
D) 70
33. What is the value of 1/4 as a percentage?
A) 4%
B) 10%
C) 25%
D) 50%
34. Simplify: 12 + [18 - (5 * 2)] / 2.
A) 15
B) 16
C) 17
D) 18
35. A number is increased by 25% and then decreased by 20%. What is the net percentage change?
A) 0%
B) 5% increase
C) 5% decrease
D) 10% increase
36. Calculate the LCM of 10, 15, and 20.
A) 30
B) 40
C) 60
D) 120
37. Find the HCF of 72 and 90.
A) 9
B) 18
C) 36
D) 72
38. What is 30% of 150?
A) 30
B) 45
C) 60
D) 75
39. Simplify: 50 - (10 * 3) + (20 / 4).
A) 25
B) 30
C) 35
D) 40
40. If a price is reduced by 10%, it becomes Rs. 180. What was the original price?
A) Rs. 190
B) Rs. 200
C) Rs. 210
D) Rs. 220
41. What is the LCM of 8 and 12?
A) 16
B) 24
C) 36
D) 48
42. Find the HCF of 45 and 60.
A) 5
B) 10
C) 15
D) 30
43. A shopkeeper sells an item for Rs. 500 after giving a 20% discount. What was the original marked price?
A) Rs. 600
B) Rs. 625
C) Rs. 650
D) Rs. 700
44. Simplify: (3 * 4) + (10 / 2) - 3.
A) 14
B) 10
C) 12
D) 15
45. What is 75% of 80?
A) 50
B) 60
C) 70
D) 90
46. Calculate the LCM of 15 and 25.
A) 5
B) 15
C) 75
D) 375
47. Find the HCF of 24 and 36 using the prime factorization method.
A) 4
B) 6
C) 12
D) 18
48. If a number is increased by 20%, it becomes 120. What is the original number?
A) 96
B) 100
C) 110
D) 120
49. Simplify: 100 / (5 * 2) + 5.
A) 10
B) 15
C) 20
D) 25
50. What is the LCM of 4 and 6?
A) 4
B) 6
C) 12
D) 24
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