1, 3, 5, 7, 9 and just keep adding two until you get to 149.
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150
The sum of all odd numbers 1 to 120,000 is 14,400,000,000.
The sum of all odd numbers 1 through 99 is 9,801.
Look for a table of prime numbers. All the odd numbers that are NOT on this list are composite numbers.
The sum of all odd numbers from 1 to 64 inclusive is 4,096