User blog comment:IbraheemSajid/Mathematics Riddle/@comment-75.70.237.19-20100909193011

X=2, Y=3, and Z=6. Ergo, 1/X = 1/2, 1/Y = 1/3, and 1/Z = 1/6. 1/2 + 1/3 + 1/6 = 5/6 + 1/6 = 6/6 = 1/1 = 1. As Eddy would say, "SUCKERS!!!" :D))