Math Practice Set: 50 MCQs with Easy Explanations (Percentage, Roots, HCF-LCM)

1. What is 25% of 640?

120 140 160 180

2. If the price of an item increases by 20%, what is the new price of ₹500?

₹550 ₹600 ₹620 ₹650

3. A student scored 360 out of 450. Percentage?

75% 80% 85% 90%

4. What percentage of 200 is 30?

10% 12% 15% 18%

5. If 40% of a number is 120, the number is

200 250 300 320

6. A number increased by 10% and then decreased by 10%

No change 1% increase 1% decrease 2% decrease

7. 15% of 80 + 20% of 50 = ?

20 22 24 26

8. What is 12.5% of 400?

40 45 50 60

9. If 60% of a number is 90, then the number is

120 130 150 180

10. A shopkeeper gives 10% discount on ₹800

₹700 ₹720 ₹750 ₹780

11. √144 = ?

10 11 12 13

12. √625 = ?

20 25 30 35

13. √196 = ?

12 13 14 15

14. √0.09 = ?

0.3 0.6 0.9 3

15. √81 × √16 = ?

24 36 48 64

16. √400 = ?

10 15 20 25

17. Which is a perfect square?

245 256 270 290

18. √169 = ?

11 12 13 14

19. √(225 ÷ 25) = ?

2 3 4 5

20. Square root of 1 is

0 1 -1 2

21. ∛27 = ?

2 3 4 5

22. ∛64 = ?

2 3 4 5

23. ∛125 = ?

3 4 5 6

24. ∛216 = ?

4 5 6 7

25. ∛1000 = ?

8 9 10 12

26. Smallest prime number is

0 1 2 3

27. 1 is

Prime Composite Even Neither prime nor composite

28. Which is divisible by 9?

234 235 236 237

29. Sum of first 10 natural numbers

45 50 55 60

30. Binary of 2 is

01 10 11 100

31. HCF of 12 and 18

2 3 6 12

32. LCM of 4 and 6

6 8 10 12

33. HCF of 15 and 25

3 5 15 25

34. LCM of 8 and 12

12 16 24 48

35. If HCF = 4 and LCM = 60, product of numbers

120 180 240 300

36. HCF of 24 and 36

6 8 10 12

37. LCM of 5, 10, 20

10 15 20 25

38. Two numbers are co-prime if HCF is

0 1 2 Same number

39. HCF of two prime numbers is

0 1 Prime Even

40. LCM of two co-prime numbers is

Sum Difference Product HCF

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