Mathematics · Classification / Odd One Out
Select the odd group of numbers. (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits.)
- 1(22 − 66 − 198)
- 2(15 − 45 − 135)
- 3(10 − 30 − 90)
- 4(17 − 51 − 147)✓
Correct answer
(17 − 51 − 147)
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