Find the mean of 4, 6, 8 and 2.
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Correct Answer: B. 5
Explanation:
(4+6+8+2) ÷ 4 = 5.
MCQ Collection
Mathematics MCQs
Algebra, arithmetic, reasoning.
A triangle has angles 50° and 60°. What is the third angle?
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Correct Answer: B. 70°
Explanation:
Angles in a triangle sum to 180°, so the third angle is 70°.
What is 35 + 27?
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Correct Answer: C. 62
Explanation:
35 + 27 = 62.
What is 18 × 4?
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Correct Answer: C. 72
Explanation:
18 × 4 = 72.
Solve x if x + 9 = 21.
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Correct Answer: C. 12
Explanation:
x = 21 - 9 = 12.
What is 25% of 80?
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Correct Answer: C. 20
Explanation:
25% of 80 = 20.
Senior-secondary mathematics task 179: What is the area of a circle of radius 9?
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Correct Answer: A. 81π
Explanation:
Use the circle-area formula A = πr². Substituting r = 9 gives A = π × 9² = 81π.
Senior-secondary mathematics task 180: In a sample of 35 items, 10 meet a condition. Enter the percentage, rounded to two decimals.
Correct Answer: 28.57
Explanation:
Percentage=(10/35)×100=28.57.
Senior-secondary mathematics task 176: Evaluate ∫₀^5 (4x+1) dx.
Correct Answer: 55
Explanation:
An antiderivative is 4/2 x²+1x. At x=5, the value is 55.0.
Senior-secondary mathematics task 177: Enter the dot product of vectors (4,2) and (2,4).
Correct Answer: 16
Explanation:
The dot product is 4×2+2×4=16.
Senior-secondary mathematics task 178: If 5^x=3125, enter x.
Correct Answer: 5
Explanation:
Rewrite the value using base 5: 3125 = 5^5. Matching exponents gives x = 5.
Senior-secondary mathematics task 167: What is the area of a circle of radius 8?
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Correct Answer: B. 64π
Explanation:
Use the circle-area formula A = πr². Substituting r = 8 gives A = π × 8² = 64π.