Odd numbers are the opposite of even numbers. They are not multiples of two and therefore cannot be evenly divided by two or any even number.
Odd numbers can be negative or positive integers. Either way, they end in an odd number: one, three, five, seven, or nine. The smallest positive odd number is one. The greatest negative odd number is negative one. When an odd number is divided by a multiple of two it results in a fraction instead of a whole number. When an odd number is multiplied by an even number, it results in the sum of an even integer.