# Super Summation 3

## This is another math trick that proves a number is even or odd. (Remember that only applies to integers.)

__Examples:__

### (Yes, I'm using the asterisk as a multiplication symbol!)

-1 + 1 - 1 + 1 = 0 = 1 - 1 + 1 - 1

The summation equals **0**, which proves that **4** is even.

-1 + 1 - 1 + 1 - 1 = -1; 1 - 1 + 1 - 1 + 1 = +1

The summation equals **±1**, which proves that **5** is odd.

-1 + 1 - 1 + 1 - 1 + 1 - 1 + 1 - 1 + 1 - 1 + 1 = 0 = 1 - 1 + 1 - 1 + 1 - 1 + 1 - 1 + 1 - 1 + 1 - 1

The summation equals **0**, which proves that **12** is even.

This number person character is Mr. Twelve Teeneet.

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© Derek Cumberbatch