Report Father and Son in New Logic/Math Puzzles Posted September 28, 2007 a : the father's age. b : the son's age. so, it says: 1.a+b = 66 2.a = kb (k is a constant) put second statement to first. => b = 66/((k+1)) since it doesn't say k needs to be Nature number. therefore, b can be any number in between 0 to 50. PS: 1. It is possible that the father is youger than the son. For example, a man married with a woman who has a son and the son is older than the man. 2. At least, the father needs to be older enough to get married. Loosely, perhaps, but not precisely:  The problem said multiple. That usually means k is not only a constant, but also an integer.  That would be step-father and step-son.