Question

What is the average of 5 consecutive odd numbers starting from 13?

• A. 17
• B. 18
• C. 20
• D. 23

Answer 1

Answer:

A. 17

The 5 consecutive odd numbers starting from 13 are:

13, 15, 17, 19, 21

Their average is:

$\frac{13 + 15 + 17 + 19 + 21}{5} = \frac{85}{5} = 17$

Shortcut: For any odd number of consecutive numbers, the average is always the middle number. Here, the middle number is 17.

$Answer: (\boxed{17})$