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natural number

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natural number

One of the set of numbers used for counting. Natural numbers comprise all the positive integers, excluding zero.
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He introduces the basic number systems of mathematics: natural numbers, integers, rational numbers, real numbers, and complex numbers.
Number systems and the foundations of analysis. (reprint, 1973) by SciTech Book News
Therefore the next two triangular numbers are 15 (10 + 5) and 21 (15 + 6) On July 10,1796, when he was 19-years-old, the mathematician Carl Friedrich Gauss wrote in his diary: "I have just proved this wonderful result that any natural number is the sum of three or fewer triangular numbers".
Top Class: DR MATHS by Evening Chronicle (Newcastle, England)
A prime number (or prime, for short) is defined as any natural number which has just two factors, itself and 1.
Prime numbers by de Mestre, Neville / Australian Mathematics Teacher
 
 
 
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