The natural numbers from 1 to 12 are:
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
The prime numbers between 1 and 12 are:
2, 3, 5, 7, 11
This is a total of 5/12 prime numbers.
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The first twelve numbers of pi are 3.14159265358
2,3,5,7,11,13, 17,19,23,29,31,37
The first twelve triangular numbers are: 1 3 6 10 15 21 28 36 45 55 66 78
The sum of the first 200 natural numbers is 20,001.
The sum of the first 10 natural numbers is 51, with an average of 5.1