Standard mathematics has recently been rendered obsolete by the discovery that for years we have been writing the numeral five backward. This has led to reevaluation of counting as a method of getting from one to ten. Students are taught advanced concepts of Boolean algebra, and formerly unsolvable equations are dealt with by threats of reprisals.
Source: Howard Eves' Return to Mathematical Circles, Boston: Prindle, Weber, and Schmidt, 1988.
Contributed by: Zaady