Q21. What is 3/5 of 50?
Correct: 30
3/5 of 50 is 30.
Q22. What is the value of |−8|?
Correct: 8
Absolute value of −8 is 8.
Q23. What is 11 × 11?
Correct: 121
11 × 11 = 121.
Q24. What is the simple interest on 100 at 10% for 1 year?
Correct: 10
Simple interest = 10.
Q25. What is the value of 0.5 × 0.2?
Correct: 0.05
0.5 × 0.2 = 0.1.
Q26. What is the value of 20²?
Correct: 400
20 × 20 = 400.
Q27. What is the next even number after 18?
Correct: 20
Next even number is 20.
Q28. What is 72 ÷ 8?
Correct: 9
72 divided by 8 equals 9.
Q29. What is the value of 5! (factorial)?
Correct: 120
5! = 5×4×3×2×1 = 120.
Q30. What is the area of a circle with radius 7 (approx)?
Correct: 154
πr² = 3.14 × 49 ≈ 154.
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