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Question
The height of which of these students is a prime number?
The height of which of these students is a prime number?
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Solution
The correct option is B
The factors of 55 are: 1, 5, 11, and 55
The factors of 47 are: 1 and 47
The factors of 65 are: 1, 5, 13, and 65
The factors of 49 are: 1, 7, and 49
Prime numbers are numbers with only two factors, 1 and the number itself.
Thus, 47 is the only prime number in the list, and its only two factors are 1 and 47.
Hence, the correct option is 47 inches.
The factors of 55 are: 1, 5, 11, and 55
The factors of 47 are: 1 and 47
The factors of 65 are: 1, 5, 13, and 65
The factors of 49 are: 1, 7, and 49
Prime numbers are numbers with only two factors, 1 and the number itself.
Thus, 47 is the only prime number in the list, and its only two factors are 1 and 47.
Hence, the correct option is 47 inches.
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