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.
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.
Numbers with their Greatest Common Divisor (GCD) as 1 are called to be as relatively prime to each other.
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.
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.
117 is composite.
The greatest common divisor of 9 and 11 is 1. Because 11 is a prime number.
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.
Prime factor each number and then multiply all the common factors to get the GCF.120=2x2x2x3x5240=2x2x2x2x3x52x2x2x3x5=120 is the Greatest Common Factor
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.
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.
Calculate their prime factors.
The GCF is 1.
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.
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
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'.
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.