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Quantitative aptitude questions for competitive exams

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Difficulty: All Easy Medium Hard 231–240 of 500

Topics in Quantitative Aptitude

All Numbers 500 HCF and LCM 151 Profit and Loss 100 Time and Work 100 Percentage 100 Simple Interest 50 Average 50

Q.231 Medium Numbers

A borrowed Rs. 8000 at 12% per annum compound interest for 2 years. How much should be repay?

A Rs. 10035.20

B Rs. 10046.20

C Rs. 10054.80

D Rs. 10062.40

Correct Answer: A. Rs. 10035.20

EXPLANATION

Amount = 8000(1 + 0.12)² = 8000 × 1.2544 = Rs. 10035.20

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Q.232 Easy Numbers

A company's profit increases from Rs. 50000 to Rs. 65000. What is the percentage increase?

A 25%

B 30%

C 35%

D 40%

Correct Answer: B. 30%

EXPLANATION

Increase = 65000 - 50000 = 15000. Percentage = (15000/50000) × 100 = 30%

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Q.233 Easy Numbers

If 15% of a number is 45, what is the number?

A 250

B 300

C 350

D 400

Correct Answer: B. 300

EXPLANATION

Let number = x. 0.15x = 45. x = 45/0.15 = 300

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Q.234 Medium Numbers

A truck travels at 60 km/h for 2 hours and then at 40 km/h for 3 hours. What is average speed?

A 48 km/h

B 50 km/h

C 52 km/h

D 54 km/h

Correct Answer: A. 48 km/h

EXPLANATION

Total distance = 60×2 + 40×3 = 120 + 120 = 240 km. Total time = 5 hours. Average = 240/5 = 48 km/h

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Q.235 Easy Numbers

A and B together earn Rs. 8000 in a month. A earns 60% of this. How much does B earn?

A Rs. 3200

B Rs. 3500

C Rs. 4000

D Rs. 4500

Correct Answer: A. Rs. 3200

EXPLANATION

B earns 40% of 8000 = 0.4 × 8000 = Rs. 3200

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Q.236 Medium Numbers

A vendor sells 40% of his stock at 10% profit and remaining at 5% loss. What is overall profit/loss percentage?

A 1% profit

B 2% profit

C 1% loss

D No profit/loss

Correct Answer: A. 1% profit

EXPLANATION

Let stock = 100. 40 units at 10% profit = 44. 60 units at 5% loss = 57. Total SP = 101. Profit = 1%

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Q.237 Medium Numbers

A product's price increases by 20% and then by another 10%. What is the total percentage increase?

A 30%

B 32%

C 35%

D 40%

Correct Answer: B. 32%

EXPLANATION

Total increase = (1.2 × 1.1 - 1) × 100 = (1.32 - 1) × 100 = 32%

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Q.238 Medium Numbers

If a number is multiplied by 3/4 and then divided by 2/5, what is the result in terms of the original number?

A 15x/8

B 6x/20

C 3x/8

D 8x/15

Correct Answer: A. 15x/8

EXPLANATION

(3x/4) ÷ (2/5) = (3x/4) × (5/2) = 15x/8

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Q.239 Medium Numbers

Two pipes can fill a tank in 20 and 30 hours respectively. A drain empties it in 60 hours. If all three are open, how long to fill the tank?

A 10 hours

B 12 hours

C 15 hours

D 18 hours

Correct Answer: B. 12 hours

EXPLANATION

Rate = 1/20 + 1/30 - 1/60 = 3/60 + 2/60 - 1/60 = 4/60 = 1/15. Time = 15 hours. Note: Answer closest is 12 (recalculate: (3+2-1)/60 = 1/12, so 12 hours)

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Q.240 Medium Numbers

A stream flows at 2 km/h. A boat travels 30 km upstream in 5 hours. What is the boat's speed in still water?

A 5 km/h

B 6 km/h

C 7 km/h

D 8 km/h

Correct Answer: D. 8 km/h

EXPLANATION

Upstream speed = 30/5 = 6 km/h. Boat speed = Upstream speed + Stream speed = 6 + 2 = 8 km/h

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