Possible, but he didn't say that only his oldest son liked hot dogs so what you deduce wouldn't be sufficient proof. For all we know, more than one of his kids could like hot dogs.
Surely the proof is the maths? 3 + 1 + 9 = 13, but 3 x 1 x 9 = 27, not 36.
2, 2, and 9 are the only numbers which fit both equations. Unless I've missed a combination somewhere.
Last Edit: May 6, 2017 12:29:40 GMT by tarathian123