Sum of squares of natural numbers

Sum of square of n natural number

If the difference of the squares of two natural numbers is 19. Find the sum of the square of these numbers? (a) 189 (b) 190 (c) 181 (d) None of these

Number of numbers of the form xxyy which are perfect squares of a natural number.

The sum of three numbers in AP is -3 and their product is 8, then sum of squares of the numbers is

The number 25^(64)xx64^(25) is the square of a natural number n. The sum of the digits of n is (a) 7 (b) 14 (c) 21 (d) 28

The sum of three positive numbers is 18 and their product is 162. If the sum of two numbers is equal to the third then the sum of squares of the numbers is: