Cambridge Blue (colour) of R 163, G 193, B 173. This colour is actually a medium tone of spring green. Spring green colours are colours with an h code (hue code) of between 135 and 165; this colour has an h code of 140, putting it within the range of spring green colours on the . The other (less traditional) colours selected for the house style are Pantone 285 (blue), 158 (orange), 369 (green), 513 (purple) and 7466 (teal). Pantone 032 (red) and 109 (yellow) feature in the official University coat of arms. The jerseys of the NSW Waratahs have been Cambridge Blue
Betrothed numbers Betrothed numbers Betrothed numbers or quasi-amicable numbers are two positive integers such that the sum of the proper divisors of either number is one more than the value of the other number. In other words, ("m", "n") are a pair of betrothed numbers if "s"("m") = "n" + 1 and s("n") = "m" + 1, where s("n") is the aliquot sum of "n": an equivalent condition is that σ("m") = σ("n") = "m" + "n" + 1, where σ denotes the sum-of-divisors function. The first few pairs of betrothed numbers are: (48, 75), (140, 195), (1050, 1925), (1575, 1648), (2024,