There are 9 natural numbers less than 10.
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Between -10 and 10 there are 9 natural numbers if exclusive of the -10 and 10, or 10 if inclusive. The natural numbers are the positive integers starting with 1, ie {1, 2, 3, ...}.
The positive integers less than 11 are the natural numbers 1-10.That is to say 1,2,3,4,5,6,7,8,9 and 10.
counting numbers greater than 1but less than 10 = 2, 3, 4, 5, 6, 7, 9
Prime numbers less than 10 = 2, 3, 5, 7The sum of prime numbers less than 10:= 2 + 3 + 5 + 7= 17
The composite numbers that are between 1 and 20 inclusive are: 4 6 8 9 10 12 14 15 16 18 20 This is a total of eleven composite numbers equal to 20 and below.