Q21. What is the average of 10 and 20?
Correct: 15
Average = (10+20)/2 = 15.
Q22. What is 18 + 27?
Correct: 45
18 + 27 = 45.
Q23. What is 90 ÷ 9?
Correct: 10
90 ÷ 9 = 10.
Q24. What is 5²?
Correct: 25
5 × 5 = 25.
Q25. What is 60% of 200?
Correct: 120
60% of 200 = 120.
Q26. What is 45 ÷ 3?
Correct: 15
45 ÷ 3 = 15.
Q27. What is the LCM of 5 and 10?
Correct: 10
LCM of 5 and 10 is 10.
Q28. What is the HCF of 8 and 12?
Correct: 4
HCF of 8 and 12 is 4.
Q29. What is 2/5 of 100?
Correct: 40
2/5 × 100 = 40.
Q30. What is 30% of 300?
Correct: 90
30% of 300 = 90.
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