# What is the Average of First 20 Composite Numbers?

getcalc.com's average of first n composite numbers calculator, formulas, numbers chart, examples & workout to find what is the mean or average of first 20 composite numbers. **18.35** is an average of first 20 composite (non-prime) numbers mentioned in the below table, by substituting the total sum and count of numbers in the below formula.

## Numbers Chart

The below chart is the complete list of first 20 composite numbers for user reference.

First 20 Composite Numbers Chart (4 - 32) | |||||||||
---|---|---|---|---|---|---|---|---|---|

4 | 6 | 8 | 9 | 10 | 12 | 14 | 15 | 16 | 18 |

20 | 21 | 22 | 24 | 25 | 26 | 27 | 28 | 30 | 32 |

## how to find the average of First 20 Composite Numbers?

The below workout with step by step calculation shows how to find what is the average of first 20 composite numbers manually.

step 1 Address the *formula*, input parameters & values.

Input parameters & values:

The first 20 composite numbers

4, 6, 8, . . . . , 30, 32

step 2 Find the sum of first 20 composite numbers

4 + 6 + 8 + . . . . + 30 + 32 = 367

step 3 Divide the sum by 20

367/20 = 18.35

Thus, **18.35** is an average of first 20 natural numbers or positive integers.

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