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Earn +20 ptsQ: Which one of these numbers are prime 11 15 21 27 56?
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Is 11 13 15 prime numbers?
11 and 13 are prime numbers but 15 is a composite number because it has more than two factors
Which of these numbers are Prime Numbers 7 2 15 11?
All except 15
What are the prime numbers 5 to 15?
They are: 5 7 11 and 13
Are 15 and 33 prime numbers?
No, they are composite numbers. The factors of 15 are 1, 3, 5, and 15. The factors of 33 are 1, 3, 11, and 33. Prime numbers have two factors: 1 and the number itself, so 15 and 33 cannot be prime.
What is the average of the first four prime numbers greater than 10?
The first four prime numbers greater than 10 are , 11, 13,17,19 Their mean is (11 + 13 + 17 + 19) / 4 = 15 NB '15' is NOT a prime number.
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