Evennumbered

Even-numbered is an adjective used to describe something that occurs at or corresponds to an even integer position or quantity. In mathematics, an even number is an integer that is divisible by 2 with no remainder. The set of even numbers includes zero, positive even numbers such as 2, 4, 6, and their negative counterparts like -2, -4, -6.

Parity and arithmetic properties define even numbers. The sum or difference of two even numbers is even, and the product of an even number with any integer is even. An even number added to an odd number yields an odd result, while the sum of two odd numbers is even. These properties underpin many counting, modular arithmetic, and combinatorial concepts.

In common usage, even-numbered describes items in a sequence that have even numerical positions. For example, even-numbered pages in a book are pages 2, 4, 6, and so on; even-numbered chapters or list entries follow the same pattern. In programming and data organization, references to even-numbered indices or elements often differentiate them from odd-numbered ones, though numbering conventions can vary (for example, 0-based vs 1-based indexing).

Notes and edge cases include that zero is considered even, and negative even numbers exist as well. The term helps distinguish position-based or count-based characteristics from other numerical properties.

See also: parity, odd number, even numbers, numbering.