# Highest Common Factor of 81, 27, 72, 72 using Euclid's algorithm

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

HCF Calculator using the Euclid Division Algorithm helps you to find the Highest common factor (HCF) easily for 81, 27, 72, 72 i.e. 9 the largest integer that leaves a remainder zero for all numbers.

HCF of 81, 27, 72, 72 is 9 the largest number which exactly divides all the numbers i.e. where the remainder is zero. Let us get into the working of this example.

Consider we have numbers 81, 27, 72, 72 and we need to find the HCF of these numbers. To do so, we need to choose the largest integer first and then as per Euclid's Division Lemma a = bq + r where 0 ≤ r ≤ b

Highest common factor (HCF) of 81, 27, 72, 72 is 9.

HCF(81, 27, 72, 72) = 9

## HCF of 81, 27, 72, 72 using Euclid's algorithm

Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.

HCF of:

Highest common factor (HCF) of 81, 27, 72, 72 is 9. ### Highest Common Factor of 81,27,72,72 is 9

Step 1: Since 81 > 27, we apply the division lemma to 81 and 27, to get

81 = 27 x 3 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 27, the HCF of 81 and 27 is 27

Notice that 27 = HCF(81,27) .

We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma

Step 1: Since 72 > 27, we apply the division lemma to 72 and 27, to get

72 = 27 x 2 + 18

Step 2: Since the reminder 27 ≠ 0, we apply division lemma to 18 and 27, to get

27 = 18 x 1 + 9

Step 3: We consider the new divisor 18 and the new remainder 9, and apply the division lemma to get

18 = 9 x 2 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 9, the HCF of 27 and 72 is 9

Notice that 9 = HCF(18,9) = HCF(27,18) = HCF(72,27) .

We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma

Step 1: Since 72 > 9, we apply the division lemma to 72 and 9, to get

72 = 9 x 8 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 9, the HCF of 9 and 72 is 9

Notice that 9 = HCF(72,9) .

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### Frequently Asked Questions on HCF of 81, 27, 72, 72 using Euclid's Algorithm

1. What is the Euclid division algorithm?

Answer: Euclid's Division Algorithm is a technique to compute the Highest Common Factor (HCF) of given positive integers.

2. what is the HCF of 81, 27, 72, 72?

Answer: HCF of 81, 27, 72, 72 is 9 the largest number that divides all the numbers leaving a remainder zero.

3. How to find HCF of 81, 27, 72, 72 using Euclid's Algorithm?

Answer: For arbitrary numbers 81, 27, 72, 72 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.