48 doesn't belong! 1-2 (+3) 5-10 (+3) 13-26 (+3) 29-48 In each set the 1st number is half of the 2nd exept for the last set.
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31 (the rest are all multiples of 3).
i feel like this doesnt belong in the "math" category...
14832
-4.2 is a negative decimal number. It is also a directed number.
I would say that 4 doesn't belong because it is not a multiple of 3.