Pallav buys chocolates at 9 for 16 and sells them at 12 for 20. what is his gain or loss per cent?

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In this video, the basic concepts of Rtion and Proportion are discussed. The content in this video is helpful to solve the Ratio and Proportion related problems.

If the sum of the digits of a number is a number that you find in the 3 times table, then the number is divisible by 3. Learn more in this video.

Why is it that if the unit's digit or rightmost digit of a number is 0, then it is divisible by 10; otherwise, not? This video teaches you this in an easy an...

In this video, the basic concepts are discussed about variation. The content in this video is helpful to understand variation and its applications.

This concept is very important in the area of data interpretation, where ratio change and ratio comparisons are very popular question types.

The concept of ratio, proportion and variation is an important one for aptitude examinations. Questions based on this chapter have been regularly asked in th...