0
the first one
11
others are not
15 = 3 x 5
21 = 3 x 7
27 = 3 x 9
56 = 4 x 14
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∙ 6y ago
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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.
What prime numbers are between 6 and 15?
The prime numbers between 6 and 15 are: 7, 11, 13
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 all of the prime numbers between 10 and 15?
The prime numbers between 10 and 15 are 11 and 13.
What are the prime numbers between 4 and 15?
The numbers 5, 7, 11 and 13 are prime.
What are all the prime numbers from 1-15?
Prime numbers from 1 to 15 are 2, 3, 5, 7, 11 and 13.
Which number 7 11 15 are not prime numbers?
15 is composite number
Are 11 15 25 and 35 composite or prime?
No because 11 is a prime number but the rest of them are composite numbers.
What fraction of numbers from 1 to 15 are prime numbers?
The prime numbers are: 2 3 5 7 11 and 13 so therefore as a fraction of 15 it is 6/15 or 2/5 simplified
How many prime numbers are less than 15?
There are six prime numbers that are less than 15: 2 3 5 7 11 and 136 of them.
What are the prime numbers 5 to 15?
They are: 5 7 11 and 13
What are three prime numbers with a sum of 15?
11+3+1=15 but 1 is not a prime number. 3 + 5 + 7 = 15
