Odd Number OutThese brain teasers rely on your ability to recognize groups of common attributes. For each of these puzzles you'll need to figure out why the words or letters are grouped as they are. Sometimes you will be asked to pick the odd-one-out or to place a new word into the correct group.
Which is the odd number out?
2460, 3251, 6152, 1836, 2204, 5317
The others have the same property: they are composite numbers, and the sum of the first two digits equals the sum of the last two digits.
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