Question

find hcf of 117 and 81 using prime factorisation method.

Answer 1

Answer:

answer is in the attachment

Answer 2

Answer:

HCF of the given number will be 9

Step-by-step explanation:

In context to question asked,

We have to determine the HCF

As per question,

We have,

117, 81

As it is mentioned to determine the HCF by using prime factorisation method.

We know that,

• HCF of two or more number is that particular number which is the highest common factors of all the given number.
• Prime factorisation method is the method in which we convert the given number as a factors of prime numbers.
• Prime numbers are those numbers which are either divisible by 1 or itself.
• HCF of any prime number is always 1

So, converting the given number in form of prime numbers,

We will get,

$117 = 3 \times 3 \times 13\\81 = 3 \times 3 \times 3 \times 3 \\=>HCF= 3 \times 3 = 9 (Common\:Numbers)$