The sum of the first 8 odd numbers is 64.
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There can be no number with an odd sum of 8 because 8 is not odd!
It may or it may not. Parity (whether the number is odd or even) has nothing to do with a sum of two odds being positive or negative. -5 + 3 = -2 is negative, while 5 + 3 = 8 is positive.
Well, honey, all you need to do is check the last digit of each number. If there's an odd number of odd digits, the sum is odd. If there's an even number of odd digits, the sum is even. So, in this case, 13 and 17 are odd, and 45 and 24 are even, which means the sum is odd without adding them all up. Easy peasy, lemon squeezy!
14
"29" is the odd one out. because all the other nos. are in the Fibonacci series, and 29 is not. In the Fibonacci series, every number (except for the first two) is the sum of the previous two numbers.