Zero
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Zero

Supplementary definitions
Zero 

0 is the integer preceding 1. ...
Zero is a number which quantifies a count or an amount of null size; that is, if the number of your brothers is zero, that means the same thing as having no brothers, and if something has a weight of zero, it has no weight. If the difference between the number of pieces in two piles is zero, it means the two piles have an equal number of pieces. ... And if there are no items to be counted, zero remains the final result. This extract is licensed under the Creative Commons AttributionShareAlike license. It uses material from the article "zero", retrieved 21 Jan 2009. 
Examples
Multiply any number by zero gives .....
How many whole numbers are there between 10,023 and 10,023.965 ?
The value of the tenths digit in this decimal 487.025 ......
When the adjacent sides of an angle are collinear, the measure of the angle is equal to ....
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