c# Language * 3 kids (X/Y/Z). Product of age is 36 (X*Y*Z=36). Sum of ages * equals house number (X+Y+Z=house#). Younger two are twins (X=Y & Z>X) * ------------------------------- * X*X*Z = 36, 2X+Z = house# * 36=12*3*1 OR 6*3*2 OR 4*3*3 or 9*2*2 * 6 is max number, for 6*6*1 = 36, but that leaves twins as older not Z>X. * 5*5*Z!=36, 4*4*Z!=36 * 3*3 = 9*4=36 where X=3 and Z=4 and Z>X (house number=10) * 2*2 = 4*9=36 where X=2 and Z=9 and Z>X (house number=13) * 1*1=1*36=36 where X=1 and Z=36 and Z>X (house number = 38)