Mathematics — All MCQs
1905 questions available
Q1421.In a bank, 8 people take 36 hours to resolve an issue. How many additional workers are needed to complete the work in 8 hours?
Correct Answer: C
Total worker-hours = 8 * 36 = 288. To complete in 8 hours: 288 / 8 = 36 workers. Since 8 are already present, additional needed = 36 - 8 = 28.
Q1422.Rs. 4,200 is lent in 2 parts. Interest on part 1 at 10% p.a. for 8 years equals interest on part 2 at 7% p.a. for 5 years. What is the second part?
Correct Answer: A
Part 1 = x => Interest = 0.8x. Part 2 = (4200 - x) => Interest = 0.35(4200 - x). 0.8x = 1470 - 0.35x => 1.15x = 1470 => x = 1278.26. Second part = 4200 - 1278.26 = Rs. 2,921.74 ≈ Rs. 2,921.
Q1423.Simplify the expression: 3(4+3) - (4+5)
Correct Answer: A
Evaluate inside parentheses: 3(7) - 9 = 21 - 9 = 12.
Q1424.Which number when multiplied by 13 (or added to itself 13 times in test notation) gives 104?
Correct Answer: C
The test implies 13x = 104. Solving for x: x = 104 / 13 = 8.
Q1425.If a² − b² = 9 and (a − b)² = 3, then ab is equal to?
Correct Answer: C
We know (a+b)(a-b) = 9. Since (a-b)² = 3 => a-b = √3. Thus a+b = 9/√3 = 3√3. Squaring both sides: (a+b)² = 27 => a²+b²+2ab = 27. Also (a-b)² = 3 => a²+b²-2ab = 3. Subtracting the two: 4ab = 24 => ab = 6.
Q1426.If 2b - 5 = 6, what is the value of b?
Correct Answer: C
2b = 11 => b = 11 / 2 = 5.5.
Q1427.A number's fifth part increased by 4 equals its fourth part reduced by 10. Find the number.
Correct Answer: C
Equation: x/5 + 4 = x/4 - 10 => x/4 - x/5 = 14 => (5x - 4x)/20 = 14 => x/20 = 14 => x = 280.
Q1428.If 4/10 of a number is 16, what is the number?
Correct Answer: C
If 4/10 of a number is 16, then: (4/10) × number = 16. Number = 16 ÷ (4/10) = 16 × (10/4) = 40.
Q1429.What is the square root of 225?
Correct Answer: B
The square root of 225 is 15.
Q1430.What is the next prime number after 5?
Correct Answer: B
The prime numbers after 5 are: 7, 11, 13... So, the next prime number after 5 is 7.
Q1431.Naeem sold a computer for Rs 25000 at which he suffered 20 percent loss. Find the purchase price of the computer.
Correct Answer: C
Selling Price = Purchase Price × (1 - Loss%). Given: Selling Price = Rs. 25,000, Loss = 20% → 25,000 = Purchase Price × 0.80. Purchase Price = 25,000 ÷ 0.80 = Rs. 31,250.
Q1432.Subtracting 40% of a number from the number, we get the result as 30. The number is?
Correct Answer: B
Let the number be x. x - 0.4x = 30 → 0.6x = 30 → x = 30 ÷ 0.6 = 50.
Q1433.What is the value of 5% of (25% of Rs. 1600)?
Correct Answer: C
25% of Rs. 1600 = 0.25 × 1600 = Rs. 400. 5% of Rs. 400 = 0.05 × 400 = Rs. 20.
Q1434.What is the value of x in the equation 3x - 15 - 6 = 0?
Correct Answer: D
3x - 15 - 6 = 0 → 3x - 21 = 0 → 3x = 21 → x = 7.
Q1435.If 15% of 40 is greater than 25% of a number by 2, the number is?
Correct Answer: A
15% of 40 = 0.15 × 40 = 6. Let the number be x. 6 = 0.25x + 2 → 4 = 0.25x → x = 16.
Q1436.What will be 160% of a number whose 200% is 140?
Correct Answer: D
Let the number be x. 200% of x = 140 → 2x = 140 → x = 70. 160% of x = 1.6 × 70 = 112.
Q1437.Aftab bought 65 books for Rs.1150 from one shop and 50 books for Rs.920 from another. What is the average price he paid per book?
Correct Answer: B
Total books = 65 + 50 = 115. Total cost = 1150 + 920 = Rs. 2070. Average price per book = 2070 ÷ 115 = Rs. 18.
Q1438.Round 3.864 to the nearest tenth.
Correct Answer: A
Look at the hundredths place (6). Since it is 5 or more, round the tenths place (8) up by 1 → 3.9.
Q1439.The number 20 is divisible by which of the following?
Correct Answer: A
20 is divisible by 1 (every number is). 3 and 7 do not divide 20 evenly.
Q1440.Calculate: 13937.869 ÷ 199.54 + 15% of 201.
Correct Answer: D
Step 1: Division: 13937.869 ÷ 199.54 ≈ 69.84. Step 2: Percentage: 15% of 201 = 30.15. Step 3: Sum both results: 69.84 + 30.15 = 99.99 ≈ 100.