Mettl Quantitative Aptitude and Reasoning 2 — Questions and Answers
Question 1: A train 240 meters long passes a pole in 12 seconds. How long will it take to pass a platform 360 meters long?
- 25 seconds
- 30 seconds (Correct answer)
- 18 seconds
- 20 seconds
Correct answer: 30 seconds
Speed = 240/12 = 20 m/s; total distance = 240+360 = 600 m; time = 600/20 = 30 seconds.
Question 2: If 15 workers can complete a job in 8 days, how many days will 10 workers take to complete the same job?
- 10 days
- 12 days (Correct answer)
- 14 days
- 16 days
Correct answer: 12 days
Total work = 15×8 = 120 worker-days; days for 10 workers = 120/10 = 12 days.
Question 3: A number is increased by 20% and then decreased by 20%. The net change is:
- No change
- 4% decrease (Correct answer)
- 2% decrease
- 4% increase
Correct answer: 4% decrease
Net multiplier = 1.2 × 0.8 = 0.96, which is a 4% decrease from the original.
Question 4: In a sequence 3, 6, 12, 24, 48, __, what is the next term?
- 72
- 84
- 96 (Correct answer)
- 60
Correct answer: 96
Each term is doubled, so 48 × 2 = 96.
Question 5: The average of 5 consecutive odd numbers is 25. What is the largest of these numbers?
- 27
- 29 (Correct answer)
- 31
- 33
Correct answer: 29
The middle (3rd) number equals the average = 25, so consecutive odds are 21, 23, 25, 27, 29; largest is 29.
Question 6: Pipes A and B can fill a tank in 12 and 18 hours respectively. If both are opened together, in how many hours will the tank be full?
- 6.0 hours
- 7.2 hours (Correct answer)
- 8.4 hours
- 9.0 hours
Correct answer: 7.2 hours
Combined rate = 1/12 + 1/18 = 5/36 per hour; time = 36/5 = 7.2 hours.
Question 7: A boat travels 30 km upstream in 5 hours and 30 km downstream in 3 hours. What is the speed of the current?
- 2 km/h (Correct answer)
- 3 km/h
- 4 km/h
- 5 km/h
Correct answer: 2 km/h
Upstream speed = 6 km/h, downstream speed = 10 km/h; current = (10−6)/2 = 2 km/h.
Mettl Quantitative Aptitude and Reasoning 2
A train 240 meters long passes a pole in 12 seconds.
How long will it take to pass a platform 360 meters long?