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Q: What is the prime number 4 6 7 8 15 21?

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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.

1, 4, 6, 8, 9, 12, 14, 15, 16, 18, 20, 21, 22...

It is 7 because it has only two factors which are itself and one

47 is a prime number 21 & 87 divisible by 3, and 4 is divisible by 2

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.

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

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

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.

3 is a prime number.4 is not a prime number. It is a composite number.

40

4 is not a prime number.

21: (3)+3=(6)+4=(10)+5=(15)+6=(21)

Yes, 4 and 15 are relatively prime.

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.

No, 4 is not a prime number.

The number 4 is not a prime number, because it is divisible by 2.

a prime number that's ONLY multiples are itself and 1. example:4*4=16 3*5=15 9*2=18 1*17=17

Yes, they are relatively prime.

It is composite because it is divisible by 3(4 + 8 + 3 = 15)

date which 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

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.

6, 10, 15, 21, 55, 91...

4 is a Composite Number.

44. 11*4=44 11+4= 15

3 is a prime number but 10 and 4 isn't

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