Graduate Management Admission Test (GMAT) Practice Test

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Which numbers are classified as prime numbers below 50?

  1. 1, 2, 3, 4, 5

  2. 2, 3, 5, 7, 11, 13, 17, 19, 29, 31, 37, 41, 43, 47

  3. All even numbers

  4. All odd numbers

The correct answer is: 2, 3, 5, 7, 11, 13, 17, 19, 29, 31, 37, 41, 43, 47

Prime numbers are defined as natural numbers greater than 1 that have no positive divisors other than 1 and themselves. To determine which numbers below 50 are prime, we evaluate the characteristics of each number in the list provided in the correct option. The correct answer lists the prime numbers less than 50: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, and 47. Each of these numbers can only be divided evenly by 1 and the number itself, confirming their status as prime. Importantly, 2 is the only even prime number since all other even numbers can be divided by 2, introducing additional divisors and disqualifying them from being prime. In contrast, the other choices do not meet the criteria for prime numbers. The first choice includes the number 1, which is not classified as a prime number. The third choice lists all even numbers, most of which are not prime except for 2, while the fourth choice includes all odd numbers, many of which (like 9, 15, 21, etc.) are not prime. Therefore,

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