The sum of first five multiples of 3 is:

If S<sub>1</sub> is the sum of an arithmetic progression of ‘n’ odd number of terms and S<sub…

The first term of an Arithmetic Progression is 22 and the last term is -11. If the sum is 66, the number of terms in the…

If the first, second and last term of an A.P. are a, b and 2a respectively, its sum is

If the first term of an A.P. is a and nth term is b, then its common difference is

What is the sum of all 3 digit numbers that leave a remainder of '2' when divided by 3?

Sum of n terms of the series $$\sqrt 2 $$  $$ + $$  $$\sqrt 8 $$  $$ + $$  $$\sqrt {…

A square is drawn by joining the mid points of the sides of a given square in the same way and this process continues in…