What is the reciprocal of a number?

The reciprocal of a number is defined as 1 divided by that number. This means if you take any number (except zero, since division by zero is undefined), the reciprocal is the value that, when multiplied by the original number, equals 1. For example, if the original number is 5, its reciprocal would be 1/5, or 0.2, because 5 * 0.2 = 1.

When evaluating the other choices, the original number itself does not represent its reciprocal, as it does not fulfill the mathematical requirement of yielding 1 when multiplied by the original number. Dividing the number into 2 yields a value that is typically unrelated to its reciprocal, and dividing a number by 0 is not defined in mathematics. Therefore, the definition aligns precisely with the choice stating that the reciprocal is 1 divided by the number.