Also..............on the conceptual side of things........pairing...........which implies TWO numbers..................this doesn't hold true for higher multiples of 9.........................36.............9 * 4 = 36..............truncating.............rounding off.......................the beginning of the degrees in a circle...........the square root of 13 start out 360.............the next TWO primes after 13.................17 and 19 add up to 36.............................17 + 19 = 36