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21=3*7
15=3*5
Not to judge, but...this shouldn't be too difficult...
Wiki User
∙ 12y ago
Wiki User
∙ 11y ago3 x 5 = 15
3 x 7 = 21
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What is the prime factorization of 399 using only 21?
The prime factorization of 399 is 3 x 7 x 19. 21 wouldn't be included since it isn't a prime number.
What is the prime factorization of 77 and 15?
The prime factorization of 77 = 7 x 11The prime factorization of 15 = 3 x 5
What is the greatest common factor of 15 and 25 and 30?
The GCF of 15, 25, and 30 is 5.The prime factorization of 15 is 3*5.The prime factorization of 25 is 5*5The prime factorization of 30 is 2*3*5So the GCF of 15, 25, and 30 is 5.
What is the greatest common factor of 15 and 38?
1 is the greatest and only common factor of 15 and 38. The prime factorization of 15 is 3*5. The prime factorization of 38 is 2*19
Is 21x 2 the only prime factorization of 42?
21 isn't prime. The prime factorization of 42 is 2 x 3 x 7.
What is the greatest common factor of 6 15 and 21?
The greatest common factor of 6, 15 and 21 is 3. The prime factorization of 6 is 2*3 The prime factorization of 15 is 3*5 The prime factorization of 21 is 3*7 The GCF is then 3, as it is the only common factor.
What is the prime factorization for 21?
The prime factorization for 21 is: 3x73 x 7 = 21
How do you do prime factorization with the number 21?
3 x 7 = 21, since both factors are prime, that is the prime factorization of 21.
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Prime Factorization of 9 and 15The prime factorization of 9 is:3 X 3The prime factorization of 15 is:3 X 5
What is the prime factorization of number 21?
The prime factorization of 21 is 3 x 7.
What is the prime numbers of 21?
Do you mean, "What is the prime factorization of 21?"
What is the prime factorizatiion of 21?
The prime factorization for 21 is 3x7.
What is the prime factorization of the number 15?
The prime factorization of 15 is 3 x 5.
Prime factorization for the number 15?
The prime factorization of 15 is 3 x 5.
What is the prime factorization of 15 and 7?
7 is already prime. The prime factorization of 15 is 3 x 5.
Can you explain why the prime factorization of 42 is 21 2?
In actual fact, the prime factorization of 42 is not 21 x 2, as 21 is not a prime number. The complete prime factorization of 42 is 2 x 3 x 7.
What is the prime factorization of twenty one?
The prime factorization of 21 is: 3 x 7
