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

1. What is the LCM of 16 and 24?
A) 32
B) 48
C) 64
D) 72
2. Find the HCF of 91 and 143.
A) 7
B) 11
C) 13
D) 14
3. A number is 25% more than another number. By what percentage is the second number less than the first?
A) 15%
B) 20%
C) 25%
D) 30%
4. Simplify: (60 - 12) / 4 + 8
A) 12
B) 17
C) 20
D) 24
5. What is 7/8 as a percentage, rounded to two decimal places?
A) 85.75%
B) 86.25%
C) 87.50%
D) 88.00%
6. Calculate the LCM of 20 and 30.
A) 40
B) 50
C) 60
D) 120
7. Find the HCF of 18, 24, and 30.
A) 2
B) 3
C) 6
D) 12
8. A product's price is increased by 10% and then decreased by 10%. If the final price is Rs. 990, what was the original price?
A) Rs. 900
B) Rs. 990
C) Rs. 1000
D) Rs. 1010
9. Simplify: 100 / (10 * 2) + 5
A) 5
B) 10
C) 15
D) 20
10. What is the LCM of 14 and 21?
A) 28
B) 42
C) 56
D) 84
11. Find the HCF of 75 and 100.
A) 15
B) 20
C) 25
D) 50
12. If a vendor buys apples for Rs. 30 per dozen and sells them for Rs. 40 per dozen, what is the profit percentage?
A) 25%
B) 30%
C) 33.33%
D) 40%
13. Simplify: 50% of 100 + 25% of 200
A) 75
B) 100
C) 125
D) 150
14. Calculate the LCM of 9 and 15.
A) 45
B) 30
C) 15
D) 90
15. Find the HCF of 42 and 56.
A) 7
B) 14
C) 21
D) 28
16. What is 12.5% as a fraction?
A) 1/4
B) 1/6
C) 1/8
D) 1/10
17. A salesman's salary is increased by 15%. If his new salary is Rs. 23000, what was his original salary?
A) Rs. 19550
B) Rs. 20000
C) Rs. 21000
D) Rs. 22000
18. Simplify the expression: 7 + 3 * (10 - 2) / 4
A) 10
B) 13
C) 16
D) 21
19. What is the LCM of 5, 10, and 15?
A) 15
B) 25
C) 30
D) 60
20. Find the HCF of 130 and 180.
A) 5
B) 10
C) 20
D) 30
21. If 40% of a number is 120, what is the number?
A) 200
B) 250
C) 300
D) 350
22. Simplify: 1/2 of (40 - 10) + 5
A) 15
B) 20
C) 25
D) 30
23. Calculate the LCM of 12, 18, and 24.
A) 36
B) 72
C) 108
D) 144
24. Find the HCF of 27, 63, and 81.
A) 3
B) 7
C) 9
D) 27
25. What is 0.75 as a fraction in its simplest form?
A) 3/5
B) 7/10
C) 3/4
D) 4/5
26. A person buys an article for Rs. 800 and sells it for Rs. 1000. What is the percentage profit?
A) 20%
B) 25%
C) 30%
D) 50%
27. Simplify: (5^2 - 3^2) / (5 - 3)
A) 2
B) 5
C) 8
D) 16
28. What is the LCM of 6, 8, and 10?
A) 40
B) 60
C) 120
D) 240
29. Find the HCF of 90 and 144.
A) 9
B) 12
C) 18
D) 36
30. A number is decreased by 20%. If the new number is 160, what was the original number?
A) 180
B) 190
C) 200
D) 210
31. Simplify: 2/3 * 9/4
A) 3/2
B) 4/3
C) 2/3
D) 1/2
32. If a student scores 75 marks out of 100, what is their percentage score?
A) 70%
B) 75%
C) 80%
D) 85%
33. Calculate the LCM of 15 and 20.
A) 30
B) 45
C) 60
D) 75
34. Find the HCF of 56 and 72.
A) 4
B) 8
C) 12
D) 16
35. What is 3/5 as a percentage?
A) 30%
B) 50%
C) 60%
D) 75%
36. A number is multiplied by 5 and then 10 is subtracted. The result is 40. What is the number?
A) 6
B) 8
C) 10
D) 12
37. Simplify the expression: 10 + (6 * 3) - 4 / 2
A) 12
B) 16
C) 26
D) 28
38. What is the LCM of 8 and 12?
A) 16
B) 24
C) 32
D) 48
39. Find the HCF of 105 and 135.
A) 5
B) 10
C) 15
D) 21
40. If the price of a shirt is reduced by 20% and the original price was Rs. 1000, what is the sale price?
A) Rs. 700
B) Rs. 800
C) Rs. 900
D) Rs. 980
41. Simplify: 3/4 + 1/2
A) 1/4
B) 3/2
C) 5/4
D) 7/4
42. What is 150% of 80?
A) 100
B) 120
C) 150
D) 160
43. Calculate the LCM of 3, 5, and 7.
A) 15
B) 21
C) 35
D) 105
44. Find the HCF of 24, 36, and 48.
A) 6
B) 12
C) 18
D) 24
45. A shopkeeper sells an item for Rs. 500, making a profit of 25%. What was the cost price of the item?
A) Rs. 400
B) Rs. 425
C) Rs. 450
D) Rs. 475
46. Simplify the expression: (15 + 5) * 2 - 10 / 5
A) 30
B) 38
C) 40
D) 50
47. What is the lowest common multiple (LCM) of 4 and 6?
A) 2
B) 12
C) 24
D) 48
48. Find the highest common factor (HCF) of 12 and 18.
A) 2
B) 3
C) 6
D) 12
49. If a number is increased by 10% and then decreased by 10%, what is the net percentage change?
A) 1% increase
B) 1% decrease
C) No change
D) 10% increase
50. What is the value of 25% of 200?
A) 25
B) 50
C) 75
D) 100
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