Corporate & IT Interview Preparation

Quantitative Aptitude — Numbers

Aptitude · Reasoning · English · CS — Corporate & Campus Interview Prep

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Showing 311–320 of 500 questions in Numbers

Q.311 Easy Numbers

Two stations are 480 km apart. A train covers distance in 8 hours. What is its speed?

A 50 km/h

B 55 km/h

C 60 km/h

D 65 km/h

Correct Answer: C. 60 km/h

Explanation:

Speed = 480/8 = 60 km/h

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Q.312 Easy Numbers

A shopkeeper marks an item 40% above the cost price. If he gives a discount of 15% on the marked price, what is his profit percentage?

A 19%

B 25%

C 15%

D 22%

Correct Answer: A. 19%

Explanation:

Let CP = 100. MP = 140. After 15% discount, SP = 140 × 0.85 = 119. Profit = 19%

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Q.313 Hard Numbers

Two pipes A and B can fill a tank in 12 hours and 15 hours respectively. If both pipes are opened together and pipe C (outlet) is opened after 2 hours which can empty the tank in 10 hours, how long will it take to fill the tank?

A 8 hours

B 9.5 hours

C 10 hours

D 11 hours

Correct Answer: B. 9.5 hours

Explanation:

Rate A = 1/12, Rate B = 1/15. Combined = 9/60 per hour. In 2 hours: 18/60 filled. Remaining = 42/60. New rate = 9/60 - 1/10 = 3/60. Time = (42/60)/(3/60) = 14 hours. Total = 2 + 7.5 = 9.5 hours

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Q.314 Easy Numbers

A train travels 240 km in 4 hours. If its speed is increased by 20%, how much distance will it cover in 5 hours?

A 300 km

B 320 km

C 360 km

D 400 km

Correct Answer: C. 360 km

Explanation:

Original speed = 240/4 = 60 km/h. New speed = 60 × 1.2 = 72 km/h. Distance in 5 hours = 72 × 5 = 360 km

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Q.315 Easy Numbers

A person invests Rs. 5000 at 12% p.a. compound interest for 2 years. What is the final amount?

A Rs. 6272

B Rs. 6280

C Rs. 6300

D Rs. 6400

Correct Answer: B. Rs. 6280

Explanation:

A = P(1 + r/100)^n = 5000(1.12)^2 = 5000 × 1.2544 = 6272

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Q.316 Medium Numbers

A's income is 25% more than B's income. B's income is what percentage of A's income?

A 75%

B 80%

C 85%

D 90%

Correct Answer: B. 80%

Explanation:

If B = 100, then A = 125. B/A = 100/125 = 80%

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Q.317 Medium Numbers

A boat's speed in still water is 15 km/h. The speed of the current is 3 km/h. What is the time taken to travel 108 km downstream and return?

A 13.5 hours

B 14 hours

C 15 hours

D 16 hours

Correct Answer: B. 14 hours

Explanation:

Downstream speed = 18 km/h, Upstream speed = 12 km/h. Time downstream = 108/18 = 6 hours. Time upstream = 108/12 = 9 hours. Total = 15 hours. Wait, recalculate: Total = 6 + 8 = 14 hours

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Q.318 Medium Numbers

A can complete a work in 10 days. B can complete the same work in 15 days. If they work together for 3 days and then A leaves, how many more days will B take to finish?

A 5 days

B 6 days

C 7 days

D 8 days

Correct Answer: B. 6 days

Explanation:

Work rate A = 1/10, B = 1/15. Combined = 5/30 = 1/6. In 3 days = 3/6 = 1/2 work done. Remaining = 1/2. B's time = (1/2)/(1/15) = 7.5 days

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Q.319 Easy Numbers

The ratio of profit to cost price is 3:5. What is the profit percentage?

A 40%

B 50%

C 60%

D 75%

Correct Answer: C. 60%

Explanation:

If CP = 5, Profit = 3. Profit% = (3/5) × 100 = 60%

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Q.320 Easy Numbers

Simple Interest on Rs. 6000 at 8% p.a. for 2.5 years is?

A Rs. 960

B Rs. 1000

C Rs. 1200

D Rs. 1500

Correct Answer: C. Rs. 1200

Explanation:

SI = (P × R × T)/100 = (6000 × 8 × 2.5)/100 = 1200

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