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GRE Math Review Questions

Category - GRE Math

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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 number that can only be divided by itself and by the number 1, without a remainder. 50, 25, and 6 can all be divided by numbers other than itself and 1. Even numbers greater than 2 are never prime.

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