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Does 15 and 20 have a greatest common divisor that's not a prime number?
Wiki User
∙ 10y ago
No. The greatest common divisor for 15 and 20 is five. Five is a Prime number.
Wiki User
∙ 10y ago
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What is the greatest common divisor of 20 and 35?
The prime factors of 20 are 2, 2 and 5 The prime factors of 35 are 5 and 7 Therefore the greatest (and, other than 1, the only) common divisor of 20 and 35 is 5.
What is the greatest common divisor of 19 and 18?
19 is a prime number, so the GCD is 1 * * * Right answer, wrong reason. 19 is indeed a prime but the GCD of 19 and 38, for example, is not 1.
What are numbers that are relatively prime to each other?
Numbers with their Greatest Common Divisor (GCD) as 1 are called to be as relatively prime to each other.
What is the greatest common divisor of the numbers 15 and 40?
To find the greatest common factor of two numbers, you first need to break them into their prime factors: 15 = 3x5 40 = 2x2x2x5 The next step is to identify any common factors. In this case, the only common factor is 5. Thus, the greatest common divisor of the numbers 15 and 40 is 5.
Is 1 and 1 relatively prime?
Yes, 1 and 1 are relatively prime. Any two integers are relatively prime if their greatest common divisor is 1. This is certainly true of 1 and 1.
Is 117 a greatest common divisor a prime number?
117 is composite.
What is the greatest common divisor of 11 and 9?
The greatest common divisor of 9 and 11 is 1. Because 11 is a prime number.
What is the greatest common divisor of 135 and 450?
45x3=135 45x10=450 3 is a the smallest (prime) number that is a factor of 135 and 450 so the greatest common divisor is 45.
What is the greatest common divisor of 120 and 240?
Prime factor each number and then multiply all the common factors to get the GCF.120=2x2x2x3x5240=2x2x2x2x3x52x2x2x3x5=120 is the Greatest Common Factor
What is the greatest common divisor of 9 and 2?
Since 2 is a prime the only numbers that can go in it are 1 and 2, where 9 has 1,3,and 9. The greatest common divisor of them would be 1 because it is the only number they could share.
What is the greatest common divisor of 22 and 23?
since 23 is a prime number, it only has 2 factors, 1 and itself, 23. 1 x 23 = 23 therefore, the greatest common divisor of 22 and 23 is 1.
How do you find the greatest common divisor in three numbers?
Calculate their prime factors.
What is the greatest common divisor of any two prime numbers?
The GCF is 1.
What is the greatest common divisor of 20 and 35?
The prime factors of 20 are 2, 2 and 5 The prime factors of 35 are 5 and 7 Therefore the greatest (and, other than 1, the only) common divisor of 20 and 35 is 5.
What is the greatest common divisor of 181 and 153?
181 is a prime and not a factor of 153. So the two are coprime and the gcd is 1. 1. 181 is a prime number and is only a multiples of 1 and 181. Since 153 is not a factor of 181, and all numbers are factors of 1, the greatest common divisor of the 2 numbers is 1
What is the greatest common factor of 92 and 252?
92 = 4 X 23; 252 = 4 X 63; and 23 and 63 have no common divisor, other than 1. Therefore, 4 is the greatest common factor of 92 and 252; that is, gcd(92, 252) = 4. By the bye, should you happen to recognise that 23 is a prime number, and that 23 is not a divisor of 63: then, it will be immediately apparent that 23 and 63 have no common divisor, other than 1. In other words, 23 has no divisor other than 1 and itself and is thus what we call a 'prime number'.
What is the greatest common divisor of 19 and 18?
19 is a prime number, so the GCD is 1 * * * Right answer, wrong reason. 19 is indeed a prime but the GCD of 19 and 38, for example, is not 1.
