Rs. 840 are divided among A, B, C and D in such a way that the shares of A and B, B and C and C as well as C and D are in the ratios of 2 : 3, 4 : 5 and 6 : 7 respectively. The share of A is

The base of a right prism is an equilateral triangle. If its height is one-fourth and each side of the base is tripled, then the ratio of the volumes of the old to the new prism is /

A loss of 19% gets converted into a profit of 17% when the selling price is increased by Rs. 162. The cost price of the article is 

How many triangles are there in the given figure?

If “@” denotes “added to”, “#” denotes “multiplied by”, “®” denotes “divided by” and “%” denotes “subtracted from”, then which of the following equation is true?

In electric supply lines in India, which parameter is kept constant? 

The primary colours in photography are –

Acid rain is mainly a mixture of—