Sum of square of `m` natural numbers

Find the sum of squares of first 9 natural numbers

If m is the square of a natural number n, then n is

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

The sum of squares of first n natural numbers is given by 1/6 n (n+1)(2n+1) or 1/6 (2n^3 + 3n^2 + n) . Find the sum of squares of the first 10 natural numbers.

Find the sum of squares of first 11 natural numbers.

Findd the sum of the squares of first 35 natural numbers.