Mathematics — All MCQs
1905 questions available
Q1801.What percent of 50 is 0.005 of 10,000?
Correct Answer: B
First calculate: 0.005 × 10,000 = 50. Then, 50 is 100% of 50.
Q1802.Find the surface area of a cube when its side length is 3 cm.
Correct Answer: C
Surface area of a cube = 6 × (side)² = 6 × 3² = 6 × 9 = 54 cm².
Q1803.What is the value of 8.73 × 8.73 × 8.73 + 4.27 × 4.27 × 4.27?
Correct Answer: C
Using the algebraic expansion a³ + b³ = (a+b)((a+b)² - 3ab) where a = 8.73 and b = 4.27, we get a+b = 13 and ab = 37.2671. Sum = 13 × (169 - 111.8013) = 742.57 approx.
Q1804.A document must be typed, proofread, and signed. Typing takes 2 hours, proofreading 1 hour, and signing 30 minutes. If only one task can be done at a time, what is the minimum time required to complete all three tasks for three documents, if tasks can be parallelized across different staff?
Correct Answer: A
With pipelining across different staff, the typist works continuously for 6 hours, but as soon as each document is done, it moves to the proofreader then signer. The final document is signed at 4.5 hours.
Q1805.A hexagon has six sides and how many angles?
Correct Answer: A
By definition, a hexagon is a polygon with 6 sides, 6 angles, and 6 vertices.
Q1806.In which type of proportion does one quantity increase while the other quantity decreases?
Correct Answer: B
In inverse proportion, the product of the two variables remains constant, meaning as one increases, the other decreases.
Q1807.The price of an item is increased by 20%, and then a 25% discount is applied. What is the net percentage change in the price?
Correct Answer: C
Assume original price = 100. Price after 20% increase = 120. After 25% discount (25% of 120 = 30), final price is 90. Net change is 10% decrease.
Q1808.An angle less than _____ is called an acute angle.
Correct Answer: C
An acute angle is strictly less than 90°. A 90° angle is a right angle.
Q1809.What is the measure of a straight angle?
Correct Answer: C
A straight angle measures exactly 180° and appears as a straight line.
Q1810.What is the largest 4-digit number exactly divisible by 88?
Correct Answer: B
The largest 4-digit number is 9999. 9999 ÷ 88 = 113.625. Earning integer product: 113 × 88 = 9944.
Q1811.If 4 mat-weavers can weave 4 mats in 4 days, how many mats would be woven by 8 mat-weavers in 4 days at the same rate?
Correct Answer: A
4 weavers weave 4 mats in 4 days means 1 weaver weaves 1 mat in 4 days. Therefore, 8 weavers working for 4 days will weave 8 mats.
Q1812.A shopkeeper buys an article for Rs 2 and sells it at a profit of 10 percent of the selling price. What is the selling price of the article?
Correct Answer: D
Profit = 10% of SP = 0.1x. CP = SP - Profit => 2 = x - 0.1x => 0.9x = 2 => x = 2 / 0.9 = 2.22.
Q1813.What is the size of the class interval (4-7)?
Correct Answer: B
Size of class interval = Upper limit − Lower limit = 7 − 4 = 3.
Q1814.Calculate 152 × 153.
Correct Answer: A
152 × 153 = 23,256.
Q1815.Solve: 5 × (5 − 7 + 9)
Correct Answer: D
5 - 7 + 9 = 7. 5 × 7 = 35.
Q1816.Solve: 3 × (6 + 5 + 7)
Correct Answer: D
6 + 5 + 7 = 18. 3 × 18 = 54.
Q1817.What is 18% of 245,000?
Correct Answer: A
18% of 245000 = (18 / 100) × 245000 = 44,100.
Q1818.Solve: (100 / 4) + 20
Correct Answer: D
100 / 4 = 25. 25 + 20 = 45.
Q1819.Does the parabola y = 2x² - 13x + 5 have a tangent whose slope is -1? If so, what is its equation?
Correct Answer: A
Slope dy/dx = 4x - 13 = -1 => x = 3. At x=3, y = 2(9) - 13(3) + 5 = -16. Tangent equation: y + 16 = -1(x - 3) => y = -x - 13.
Q1820.One mile is equal to how many kilometers?
Correct Answer: A
By internationally accepted standard conversion, 1 mile is equal to 1.60934 kilometers.