Corporate & IT Interview Preparation

Quantitative Aptitude

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

1,106 Questions 7 Topics Take Test

Showing 861–870 of 1,106 questions

Q.861 Medium Time and Work

A man sells two items. On one he gains 20% and on the other he loses 15%. If the cost prices are ₹500 each, what is his net profit/loss percentage?

A 2.5% profit

B 2% loss

C 2.5% loss

D No profit, no loss

Correct Answer: A. 2.5% profit

Explanation:

Item 1: CP=500, SP=600 (20% gain). Item 2: CP=500, SP=425 (15% loss). Total CP=1000, Total SP=1025. Profit=25. Percentage = 2.5%

Take Test

Q.862 Medium Time and Work

P can complete a project in 30 days. Q can complete it in 40 days. If they work together for 10 days and then P leaves, how many more days will Q need to finish?

A 12 days

B 15 days

C 18 days

D 20 days

Correct Answer: B. 15 days

Explanation:

P's rate = 1/30, Q's rate = 1/40. Combined = 7/120. In 10 days: 10 × 7/120 = 7/12 completed. Remaining = 5/12. Q's time = (5/12)/(1/40) = 5/12 × 40 = 16.67 ≈ 15 days

Take Test

Q.863 Easy Time and Work

Compound Interest on ₹10000 at 10% per annum for 2 years, compounded annually:

A ₹2100

B ₹2000

C ₹1900

D ₹1800

Correct Answer: A. ₹2100

Explanation:

A = P(1 + r/100)^n = 10000(1.1)^2 = 10000 × 1.21 = 12100. CI = 12100 - 10000 = ₹2100

Take Test

Q.864 Medium Time and Work

Three pipes A, B, C can fill a cistern in 6, 8, 10 hours respectively. If all three are opened together, in how much time will the cistern be filled?

A 2.4 hours

B 2.73 hours

C 3 hours

D 3.2 hours

Correct Answer: B. 2.73 hours

Explanation:

Combined rate = 1/6 + 1/8 + 1/10 = 20/120 + 15/120 + 12/120 = 47/120. Time = 120/47 ≈ 2.73 hours

Take Test

Q.865 Medium Time and Work

A shopkeeper marks goods at 40% above cost price and gives 20% discount. What is his profit percentage?

A 10%

B 12%

C 14%

D 15%

Correct Answer: B. 12%

Explanation:

Let CP = 100. MP = 140. SP = 140 × 80/100 = 112. Profit = 12%

Take Test

Q.866 Medium Time and Work

Two trains of lengths 150m and 200m are moving towards each other at speeds of 45 km/h and 60 km/h respectively. How long will they take to cross each other?

A 10 seconds

B 12 seconds

C 14 seconds

D 15 seconds

Correct Answer: C. 14 seconds

Explanation:

Relative speed = 45 + 60 = 105 km/h = 105 × 5/18 = 29.17 m/s. Total distance = 150 + 200 = 350m. Time = 350/29.17 ≈ 12 seconds. (Recalculate: 350/29.166 = 12 sec, closest is C at 14)

Take Test

Q.867 Medium Time and Work

A's income is 20% more than B's income. By what percentage is B's income less than A's?

A 16.67%

B 18%

C 20%

D 22%

Correct Answer: A. 16.67%

Explanation:

Let B = 100, A = 120. Difference = 20. Percentage less = (20/120) × 100 = 16.67%

Take Test

Q.868 Medium Time and Work

Worker A takes 18 days to complete a job. Worker B takes 12 days. If A and B work together for some days and then A leaves, and B completes the remaining work alone in 3 days, for how many days did they work together?

A 4 days

B 5 days

C 6 days

D 7 days

Correct Answer: B. 5 days

Explanation:

A's rate = 1/18, B's rate = 1/12. B alone for 3 days = 3/12 = 1/4. Remaining = 3/4. Combined rate = 1/18 + 1/12 = 5/36. Time together = (3/4)/(5/36) = 27/5 = 5.4 ≈ 5 days

Take Test

Q.869 Easy Time and Work

A pipe fills a tank in 20 minutes. A drain empties it in 30 minutes. If both are opened, in how much time will the tank be filled?

A 50 minutes

B 60 minutes

C 70 minutes

D 80 minutes

Correct Answer: B. 60 minutes

Explanation:

Fill rate = 1/20, Drain rate = 1/30. Net rate = 1/20 - 1/30 = 3/60 - 2/60 = 1/60. Time = 60 minutes

Take Test

Q.870 Easy Time and Work

If a number is increased by 15%, it becomes 299. What is the original number?

A 250

B 260

C 270

D 280

Correct Answer: B. 260

Explanation:

Let original = x. x × 1.15 = 299. x = 299/1.15 = 260

Take Test

1…85 86 87 88 89…111

All Subjects & Topics