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.

A rational number between and is :

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

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: 

The greatest 4-digit number which is a perfect square is

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

The product of two numbers is 24 times the difference of these two numbers. If the sum of these two numbers is 14. Find the larger number?

The product of two numbers is 45 and their difference is 4. The sum of squares of the two numbers is