Which number is a prime number 14,13,21,33 ?
2 answers:
The answer you are looking for would be B. 13. Prime numbers are numbers that are not divisible by any numbers except 1 and itself. All even numbers (except 2) are divisible by 2, therefore eliminating 14. 21 and 33 are both divisible by 3 (21/3 = 7 and 33/3 = 11). Thus making 13 the prime number. I hope this helps!
A prime number means that the number is only divisible by one and itself. 14 is a multiple of 2 and 7, so 14 wouldn't be it. 21 is a multiple of 3 and 7, so 21 wouldn't be it. 33 is a multiple of 3 and 11, so 33 wouldn't be it. 13 is only divisible by itself because no number can be multiplied to get 13. So the correct answer is : 13 is the prime number.
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