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Quantitative-aptitude Questions Set 137:

Quiz Mode

What is the average of the first 10 whole numbers?

4.5

5.5

Solution:

If 15% of 30% of 50% of a number is 90, what is the number?

4000

3050

4400

4500

Solution:

The sum of ages of 5 children born at intervals of 3 years each is 50 years. What is the age of the youngest child?

Solution:

The speed of two trains are 45 km/h and 10 m/s respectively. What will be the ratio of their speeds?

9 : 2

5 : 4

4 : 5

2 : 9

Solution:

A certain industrial loom weaves 0.128 meters of cloth every second. Approximately how many seconds will it take for the loom to weave 25 meters of cloth?

205

200

180

195

Solution:

What is the relation between Standard Deviation and Variance?

Standard Deviation is equal to Variance

Standard Deviation is the square of Variance

Standard Deviation is the square root of Variance

Solution:

A cistern can be filled by an inlet in 6 hours and can be emptied by an outlet in 8 hours. If the inlet and outlet are opened together, in what time the cistern can be filled?

24 hours

20 hours

14 hours

18 hours

Solution:

Robert is traveling on his cycle and has calculated to reach point A at 2 p.m. if he travels at 10 km/h; he will reach there at 12 noon if he travels at 15 km/h. At what speed must he travel to reach A at 1 p.m.?

8 km/h

11 km/h

12 km/h

14 km/h

Solution:

There is an 80% increase in an amount over 8 years at simple interest. What will be the compound interest of that 80% increase in the amount over 8 years? What will be the compound interest of Rs. 14,000 after 3 years at the same rate?

Rs. 3,794

Rs. 3,714

Rs. 4,612

Rs. 4,634

Solution:

Two cars X and Y start from two places A and B respectively, which are 700 km apart, at 9:00 am. Both the cars run at an average speed of 60 km/h. Car X stops at 10:00 am and again starts at 11:00 am, while the other car Y continues to run without stopping. When do the two cars cross each other?

2:40 pm

3:20 pm

4:10 pm

4:20 pm

Quantitative-aptitude Questions Set 137:

What is the average of the first 10 whole numbers?

Solution:

If 15% of 30% of 50% of a number is 90, what is the number?

Solution:

The sum of ages of 5 children born at intervals of 3 years each is 50 years. What is the age of the youngest child?

Solution:

The speed of two trains are 45 km/h and 10 m/s respectively. What will be the ratio of their speeds?

Solution:

A certain industrial loom weaves 0.128 meters of cloth every second. Approximately how many seconds will it take for the loom to weave 25 meters of cloth?

Solution:

What is the relation between Standard Deviation and Variance?

Solution:

A cistern can be filled by an inlet in 6 hours and can be emptied by an outlet in 8 hours. If the inlet and outlet are opened together, in what time the cistern can be filled?

Solution:

Robert is traveling on his cycle and has calculated to reach point A at 2 p.m. if he travels at 10 km/h; he will reach there at 12 noon if he travels at 15 km/h. At what speed must he travel to reach A at 1 p.m.?

Solution:

There is an 80% increase in an amount over 8 years at simple interest. What will be the compound interest of that 80% increase in the amount over 8 years? What will be the compound interest of Rs. 14,000 after 3 years at the same rate?

Solution:

Two cars X and Y start from two places A and B respectively, which are 700 km apart, at 9:00 am. Both the cars run at an average speed of 60 km/h. Car X stops at 10:00 am and again starts at 11:00 am, while the other car Y continues to run without stopping. When do the two cars cross each other?

Solution:

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