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The list of prime numbers continues infinitely, as stated by Euclid’s theorem. The prime numbers less than 100 are 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89 and 97. A numb... More »

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31 is a prime number. This is due to the fact that it is only divisible by itself and the number one, which is the criteria for any prime number. More »

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Forty-three is a prime number. This is due to the fact that it can only be divided by itself and the number one, which is how a number qualifies as a prime number. More »

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A list of odd numbers is a list of numbers that all have a remainder of 1 when divided by 2. The following is an example of a list of odd numbers: 1, 3, 5, 7, 9, 11, 13 15, 17, 19 and 21. More »

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Pi is a real number, as all numbers that exist on a number line are real. Real numbers include all rational and irrational numbers; pi is defined as an irrational number. More »

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To find the greatest common factor of two or more numbers, find the factors of each number, then circle the shared factors. Choose the greatest factor that the numbers share. More »

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A numeric order is a way to arrange a sequence of numbers and can be either ascending or descending. For example, an ascending numerical order of area codes for the United States starts with 201, 203, 204 and 205. More »

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