A religious tenet stating that whatever energy a person puts out into the world, be it positive or negative, will be returned to that person three times
If two ratios are equal, then the denominator of the second equals its numerator times the reciprocal of the first ratio: if \frac ab=\frac cd then d=\frac{bc}a
An accepted guideline that states a solution presented in pattern format is not truly a pattern unless at least three independent occurrences of that solution exist
A requirement that selection must be made from the highest three eligible candidates on the certificate who are available for the job to which they applied