Question

What is the odd man out ? (16,30,34)(11,40,41)(20,21,29)(11,60,61)

Answer 1

The three numbers given form a pythagorean triplet.
16² + 30² = 256 + 900 = 1156 = 34²
20² + 21² = 400 + 441 = 841 = 29²
11² + 40² = 121 + 1600 = 1721 ≠ 41²
11² + 60² = 121 + 3600 = 3721 = 61²

So (11,40,41) is odd since these three are not pythagorean triplet.

Answer 2

11,40,41 is the odd which is not being at pythagoras triplet .