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The Prime number is 7, because the only factors for 7 are 1 and 7.
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What is the prime number for 4 6 7 8 15 21?
It is 7 because it has only two factors which are itself and one
What number is a prime factor of both 12 and 21?
'3' 3 x 4 = 12 3 x 7 = 21 NB '7' is also a prime number.
Are 4 and 15 relatively prime?
Yes, 4 and 15 are relatively prime.
Is 3 or 4 a prime number?
3 is a prime number.4 is not a prime number. It is a composite number.
Is 4 a prime number?
No, the number 4 is not a prime number because 2X2 = 4.A prime number is a number that can only be divided into 1 and itself.No.
Are 4 and 21 relatively prime?
Yes, 4 and 21 are relatively prime. Numbers that are relatively prime only have the number 1 as a common factor. That is the case with 4 and 21.
What is a number that isn't a prime number?
1, 4, 6, 8, 9, 12, 14, 15, 16, 18, 20, 21, 22...
What is the prime number for 4 6 7 8 15 21?
It is 7 because it has only two factors which are itself and one
Is there a prime number that is a multiple of 21?
No, it is not possible. Every multiple of 21 is a composite number. 21 is a composite number and its factors are 1, 3, 7 and 21(4 factors). Any multiple of 21 must have all the factors of 21. So, every multiple of 21 has at least 4 factors. And a prime number has only two factors so, any multiple of 21 can't be prime.
Which one of these are prime numers 21 47 87 or 4?
47 is a prime number 21 & 87 divisible by 3, and 4 is divisible by 2
Wihch is a prime number 4 13 26 15?
A prime number can only be divided by itself and 1. 4 can be divided by 2 26 can be divided by 2 15 can be divided by 3
What prime number between 40 and 60 is 4 greater than another prime?
40/4=10 60/4=15 Then the second prime are between 10 and 15, two prime numbers: 11 and 13 The prime number is between 44 and 52 : 47
Why is 19 a prime number but 15 is not a prime number?
19 only has 2 factors - itself and 1. 15 has 4 factors - itself, 1, 3, and 5. Prime numbers can only have 2 factors. 19 is prime, 15 is composite.
What number is a prime factor of both 12 and 21?
'3' 3 x 4 = 12 3 x 7 = 21 NB '7' is also a prime number.
What is the next number in the number pattern 3 6 10 15?
21: (3)+3=(6)+4=(10)+5=(15)+6=(21)
Is it possible to have a prime and triangular number result when you roll 4 dice?
First few triangular numbers: 0, 1, 3, 6, 10, 15, 21, 28 Numbers that can be thrown with four dice: 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 Which of these numbers that are triangular: 6, 10, 15, 21 None of these is prime.
What date is not a prime number between 1 31?
4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30
