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Quantitative-aptitude Questions Set 301:

Quiz Mode

In how many ways can 2 students be chosen from a group of 15 students?

13!

105

15!

15!/2!

Solution:

The equation of a straight line parallel to y = 2x + 1 and passing through the point (1, 2) is:

2x + y = 1

x + 2y = 2

2x - y = 1

y = 2x

Solution:

When 2 is added to half of one-third of one-fifth of a number, the result is one-fifteenth of the number. Find the number?

None

Solution:

The speed of a car is 90 km in the first hour and 60 km in the second hour. What is the average speed of the car?

75 kmph

74 kmph

65 kmph

58 kmph

Solution:

A finishes a piece of work in 10 days and B finishes the same work in 15 days. When will they complete the work if they work together?

9 days

6 days

5 days

4 days

Solution:

Two trains are moving in opposite directions @ 60 km/hr and 90 km/hr. Their lengths are 1.10 km and 0.9 km respectively. The time taken by the slower train to cross the faster train in seconds is:

Solution:

Two trains of length 120 m and 280 m are running towards each other on parallel lines at 42 km/h and 30 km/h respectively. In what time will they be clear of each other from the moment they meet?

14 s

17 s

21 s

20 s

Solution:

A jogger running at 9 kmph alongside a railway track in 240 meters ahead of the engine of a 120 meters long train running at 45 kmph in the same direction. In how much time will the train pass the jogger?

3.6 sec

36 sec

1.8 sec

18 sec

Solution:

In a bolt factory, machines A1, A2, and A3 manufacture 25%, 35%, and 40% of the total output, respectively. Of these, 5%, 4%, and 2% of the bolts produced by each machine are defective. If a randomly drawn bolt is found to be defective, what is the probability that it was manufactured by machine A2?

0.4058

0.5058

0.2351

0.4834

Solution:

A tank is filled by three pipes with uniform flow. The first two pipes operating simultaneously fill the tank in the same time during which the tank is filled by the third pipe alone. The second pipe fills the tank 5 hours faster than the first pipe and 4 hours slower than the third pipe. The time required by the first pipe is:

6 hours

8 hours

10 hours

15 hours

Quantitative-aptitude Questions Set 301:

In how many ways can 2 students be chosen from a group of 15 students?

Solution:

The equation of a straight line parallel to y = 2x + 1 and passing through the point (1, 2) is:

Solution:

When 2 is added to half of one-third of one-fifth of a number, the result is one-fifteenth of the number. Find the number?

Solution:

The speed of a car is 90 km in the first hour and 60 km in the second hour. What is the average speed of the car?

Solution:

A finishes a piece of work in 10 days and B finishes the same work in 15 days. When will they complete the work if they work together?

Solution:

Two trains are moving in opposite directions @ 60 km/hr and 90 km/hr. Their lengths are 1.10 km and 0.9 km respectively. The time taken by the slower train to cross the faster train in seconds is:

Solution:

Two trains of length 120 m and 280 m are running towards each other on parallel lines at 42 km/h and 30 km/h respectively. In what time will they be clear of each other from the moment they meet?

Solution:

A jogger running at 9 kmph alongside a railway track in 240 meters ahead of the engine of a 120 meters long train running at 45 kmph in the same direction. In how much time will the train pass the jogger?

Solution:

In a bolt factory, machines A1, A2, and A3 manufacture 25%, 35%, and 40% of the total output, respectively. Of these, 5%, 4%, and 2% of the bolts produced by each machine are defective. If a randomly drawn bolt is found to be defective, what is the probability that it was manufactured by machine A2?

Solution:

Solution:

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