Two numbers are respectively 30% and 40% less than a third number. What percent is the first number of the second?

A rational number between and is :

The sum of two digit number is 16. If the digit is interchanged the number is formed 18 less than the original number. Find the original number.

What should be added at least in 1140 so that it becomes a perfect square?

The sum of all natural numbers between 100 and 200. Which are multiple of 3 will be: 

x is a five - digit number. The digit in ten thousand's place is 1. The number formed by its digits in unit's and ten's places is divisible by 4. The sum of all the digits is divisible by 3 . If 5 and 7 also divide x, then x will be: 

What is the sum of first 14 natural numbers?

Divide 50 into two parts so that the sum of their reciprocals is