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TEAS Nursing School Review Questions

Category - Mathematics

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Which of the following is a prime number?

Explanation

Answer: C - 23 is a prime number. A prime number is a positive integer that can only be divided by itself and by the number 1 without a remainder. 57, 49, and 21 can all be divided by numbers other than themselves and 1. Note that 2 is considered a prime number; all other prime numbers are odd.

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