MATHS MCQS
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- -1
- 1
- 3
- Zero
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Explanation
The cube roots of unity are 1, ω, and ω², where ω = -1 + √3i / 2 and ω² = -1 - √3i / 2.
Their product is 1 × ω × ω² = 1.
- 4 right angles
- 2 right angles
- 3 right angles
- None of these
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Explanation
The sum of the interior angles of a quadrilateral is 360°.
Since 1 right angle = 90°, the sum equals 4 right angles (4 × 90° = 360°).
- 8894
- 7894
- 7994
- None of these
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Explanation
Toys per day = 28,550 ÷ 25 = 1,142
Toys in 7 days = 1,142 × 7 = 7,994
- Recurring decimal
- Terminating decimal
- Non-recurring decimal
- None of these
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Explanation
5/22 = 0.227272727..., which repeats the pattern "27" infinitely.
A recurring decimal has a repeating sequence of digits after the decimal point.
- 4
- 2
- 3
- None of these
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Explanation
The degree of a polynomial is the sum of the highest exponents of variables in a term.
In 2x²y², the sum of exponents is 2 + 2 = 4.
- Quadrant II
- Quadrant III
- Quadrant IV
- None of these
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Explanation
tanθ < 0 means that sine and cosine have opposite signs (one positive, one negative).cosθ > 0 means cosine is positive, which occurs in Quadrants I and IV.
Since tanθ is negative in Quadrant IV, the correct answer is Quadrant IV.
- 40°
- 90°
- 80°
- None of these
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Explanation
The sum of angles in a triangle is 180°, so:
A + B + C = 180° → A + B + 60° = 180° → A + B = 120°
Given A = 3B, substitute: 3B + B = 120° → 4B = 120° → B = 30°, so A = 90°.
- Cubic root
- Index
- Radical
- None of these
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Explanation
The symbol "√" represents the square root and is called a radical.
It is used in mathematics to indicate the root of a number.
- 384m
- 192m
- 300m
- None of these
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Explanation
The side length of the square is found by √9216 = 96m.
The perimeter of a square is 4 × side = 4 × 96 = 384m.
- 7.11 tola gold
- 7.22 tola gold
- 7.33 tola gold
- None of these
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Explanation
Zakat on gold is 2.5% of the total gold value.
Let x be the total gold in tolas.
- Zakat formula:
(2.5/100) × (60,000 × x) = 11,000
Solving for x:
- 0.025 × 60,000 × x = 11,000
- 1,500x = 11,000
- x = 11,000 / 1,500
- x = 7.33 tola
Thus, Neelam has 7.33 tola gold.
