Concept 3 of 3

Odd one out (classification)

Odd one out: pick the one that doesn't belong. The others share a property — name it, then find the misfit.

Example

9, 16, 25, 30, 36 — which is odd? 9, 16, 25, 36 are perfect squares (3², 4², 5², 6²). 30 is not. 30 is the odd one out.

💡 Tip:Often the property is: even/odd, square, cube, prime, vowel/consonant, polygon-side-count.