Question 16

Which of the following is a Prime Number?

Solution

A prime number is a number which has factors of 1 and itself.
Factors of 12 are 1,3,4 and 12.
Factors of 7 are 1 and 7.
Factors of 9 are 1,3 and 9
Factors of 4 are 1,2 and 4.
Hence, 7 is a prime number.

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Which of the following is a Prime Number?

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