An odd number is an integer when divided by two, either leaves a remainder or the result is a fraction. One is the first odd positive number but it does not leave a remainder 1. Some examples of odd numbers are 1, 3, 5, 7, 9, and 11. An integer that is not an odd number is an even number.

- Wikipedia

"God delights in an odd number." (Numero deus impare gaudet.)

- Virgil, Eclogues, viii, 75.

"This is the third time; I hope good luck lies in odd numbers...
Away, go; for they say there is divinity in odd numbers, either in nativity, chance, or death!"

- William Shakespeare, Falstaff in The Merry Wives of Windsor