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?

Find the sum of the first 100 natural numbers

Study the numbers and complete the series 6, 24, 60, 120, 210, 336, 504, ?