Whole numbers less than 20 are the set of numbers starting from 1 and ending at 19. These numbers do not include fractions or decimals, and they are all positive integers. The set of whole numbers less than 20 is {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19}.
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There are infinitely many whole numbers which are less than 20. Start with 19 and go back, beyond 0, to negative infinity.
whole numbers would be 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20.
14
There are infinitely many whole numbers which are greater than 20.
All the prime numbers less than 20 are 2,3,5,7,11,13,17,19