Two pipes P and Q would fill a cistern in 24 hours and 32 hours respectively. If both pipes are opened together, find when the pipe “P” must be turned off so that the cistern may be just filled in 16 hours-

A certain sum of money yields Rs. 1261 as compound interest for 3 years at 5% per annum. The sum is: 

Three numbers are in the ratio 1 : 2 : 3 and the sum of their cubes is 4500. What is the smallest number?

A bullet travels at 750 m/s. How long will it take to travel 1 km?

Directions: The following Pie Chart shows the export of different food grains from India in 2010. Study the chart and answer the questions:

Of the total export of foodgrains, the percentage of crop B exported is 

Directions: Find the wrong number in the following number series:

2, 3, 8, 31, 154, 924, 6460

The length, the breadth, and the height of a cuboid are 40 cm, 20 cm and 10 cm. respectively. What is the volume of this cuboid?

If the average marks of three batches of 30, 50 and 70 students is 55, 70 and 70 respectively, then the average marks of all the students is: