1,3,5 and 7
The first four odd numbers are 1, 3, 5 and 7. Odd numbers are not divisible by two.
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The sum of any four odd numbers will never be equal to an odd number.
The sum of the first 100 odd numbers is 10,000.
The sum of the first 10 odd whole numbers is 100.
Four 17 19 21 23
Yes, the factors of all odd numbers are odd numbers.