0 + 1 + 1 + 2 + 3 + 5 + 8 = 20
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the answer is 49.
the sum of the first 15 prime numbers is 328 .
The sum of the first 25 prime numbers is 1,060.
The sum of the first 100 odd numbers is 10,000.
The sum of the first 10 odd whole numbers is 100.