Question

1.81,108 find the HCF using prime factorisation method​

Answer 1

Answer:

gcf, hcf, gcd (81; 108) = 33 = 27;

The numbers have common prime factors

Step-by-step explanation:

Prime Factorization of a number: finding the prime numbers that multiply together to make that number.

81 = 34;

81 is not a prime, is a composite number;

108 = 22 × 33;

108 is not a prime, is a composite number;

* Positive integers that are only dividing by themselves and 1 are called prime numbers. A prime number has only two factors: 1 and itself.

* A composite number is a positive integer that has at least one factor (divisor) other than 1 and itself.

Calculate the greatest (highest) common factor (divisor), gcf, hcf, gcd:

Multiply all the common prime factors, by the lowest exponents (if any).

gcf, hcf, gcd (81; 108) = 33