Calculate the sum of the following

The first 15 Even Numbers

S_{15} = n(n + 1)

S_{15} = 15(15 + 1)

S_{15} = 15(16)

S_{15} = **240**

A = | Sum of the first 15 Even Numbers |

Count |

A = | 240 |

15 |

Average (A) of the first 15 Even Numbers = **16**

n | E_{n} |
---|---|

1 | 2 |

2 | 4 |

3 | 6 |

4 | 8 |

5 | 10 |

6 | 12 |

7 | 14 |

8 | 16 |

9 | 18 |

10 | 20 |

11 | 22 |

12 | 24 |

13 | 26 |

14 | 28 |

15 | 30 |

S_{15} = **240**

Average (A) of the first 15 Even Numbers =**16**

Average (A) of the first 15 Even Numbers =

S_{15} = **240**

Average (A) of the first 15 Even Numbers =**16**

Average (A) of the first 15 Even Numbers =

Free Sum of the First (n) Numbers Calculator - Determines the sum of the first (n)

* Whole Numbers

* Natural Numbers

* Even Numbers

* Odd Numbers

* Square Numbers

* Cube Numbers

* Fourth Power Numbers

This calculator has 1 input.

* Whole Numbers

* Natural Numbers

* Even Numbers

* Odd Numbers

* Square Numbers

* Cube Numbers

* Fourth Power Numbers

This calculator has 1 input.

Sum of the first n whole numbers = n(n - 1)/2

Sum of the first n natural numbers = n(n - 1)/2

Sum of the first n even numbers = n(n - 1)

Sum of the first n odd numbers = n^{2}

Sum of the first n square numbers = n(n + 1)(2n + 1)/6

Sum of the first n cube numbers = n^{2}(n + 1)^{2}/4

Sum of the first n fourth power numbers = n(n + 1)(2n + 1)(3n^{2} + 3n - 1)/30

For more math formulas, check out our Formula Dossier

Sum of the first n natural numbers = n(n - 1)/2

Sum of the first n even numbers = n(n - 1)

Sum of the first n odd numbers = n

Sum of the first n square numbers = n(n + 1)(2n + 1)/6

Sum of the first n cube numbers = n

Sum of the first n fourth power numbers = n(n + 1)(2n + 1)(3n

For more math formulas, check out our Formula Dossier

- even number
- a whole number that is able to be divided by two into two equal whole numbers
- integer
- a whole number; a number that is not a fraction

...,-5,-4,-3,-2,-1,0,1,2,3,4,5,... - natural number
- the positive integers (whole numbers)

1, 2, 3, ... - odd number
- a whole number that is not able to be divided by two into two equal whole numbers
- sum
- the total amount resulting from the addition of two or more numbers, amounts, or items
- sum of the first (n) numbers
- whole number
- numbers that include natural numbers and zero

{0, 1, 2, 3, ...}

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