A number that can be expressed as a Fraction where and are Integers and , is called a rational number with Numerator and Denominator . Numbers which are not rational are called Irrational Numbers. Any rational number is trivially also an Algebraic Number.

For , , and any different rational numbers, then

is the Square of a rational number (Honsberger 1991). The probability that a random rational number has an Even Denominator is 1/3 (Beeler

**References**

Beeler, M.; Gosper, R. W.; and Schroeppel, R. *HAKMEM.* Cambridge, MA: MIT
Artificial Intelligence Laboratory, Memo AIM-239, Feb. 1972.

Courant, R. and Robbins, H. ``The Rational Numbers.'' §2.1 in
*What is Mathematics?: An Elementary Approach to Ideas and Methods, 2nd ed.*
Oxford, England: Oxford University Press, pp. 52-58, 1996.

Honsberger, R. *More Mathematical Morsels.* Washington, DC: Math. Assoc. Amer., pp. 52-53, 1991.

© 1996-9

1999-05-25