The difference in selling price of a radio at gains of 10% and 15% is Rs. 80. Find the price of the radio.

What percentage is 1/8 ?

One fifth of a number exceeds its one seventh by 154. Find the number

A boy was required to divide a given number by 3/5 while he wrongly multiplied the same number with 3/5 . If he gets the answer as 4 1/2 what is the correct answer?

The area of a hall is 1250 sq.m. The length of the hall is double its breadth. The length of the hall is

At what rate of simple interest per annum an amount will be doubled in 10 years?