The odd numbers in this group add up to 64 : 15, 32, 5, 13, 82, 7, 1, 23
A : The odd numbers in this group are 15, 5, 13, 7, 1 and 23 : 15+5+13+7+1+23 = 64. The answer is True.

The odd numbers in this group add up to 24 : 16,  11, 14, 4, 8, 13, 24.
A : The odd numbers in this group are 11 and 13 : 11 + 13 = 24. The answer is True.

The odd numbers in this group add up to 31 : 14, 25, 6, 12, 9, 5.
A : The odd numbers in this group are 25, 9 and 5 : 25+9+5=39, which is different from 31. The answer is False
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Complete : 
The odd numbers in this group add up to 20 : 1, 6, 7, 9, 10, 19.
A : 