Sum of first n natural numbers= n(n+1)/2
Sum of first n even numbers=n(n+1)
Sum of first n odd numbers=n^2
Sum of square of first n natural numbers=[n(n+1)(2n+1)]/6
Sum of square of first n even natural numbers= [2n(n+1)(2n+1)]/3
Sum of square of first n odd numbers=[n(4(n^2) - 1)]/3
Sum of cube of first n natural numbers={[n(n+1)]/2}^2
Sum of cube of first n even natural numbers=2[n(n+1)]^2
Sum of cube of first n odd natural numbers= (n^2...
