# Quantitative Aptitude - Average - Formula & Concept Tutorial

- Average =
- Suppose a man covers a certain distance at x kmph and an equal distance at y kmph. Then , the average speed during the whole journey is kmph
- The average of first n natural number is

For example –

The average of first 3 natural number is

Using formula –

Using Normal Method –

= 2

- The average of the squares of the first n natural numbers is
- The average of the cubes of the first n natural numbers is
- Consecutive number be x, x+1, x+2, x+3, x+4, x+5 ….. x+n.