Highest Common Factor of 72, 81, 747 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 72, 81, 747 i.e. 9 the largest integer that leaves a remainder zero for all numbers.

HCF of 72, 81, 747 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 72, 81, 747 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 72, 81, 747 is 9.

HCF(72, 81, 747) = 9

HCF of 72, 81, 747 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 72, 81, 747 is 9.

Highest Common Factor of 72,81,747 using Euclid's algorithm

Highest Common Factor of 72,81,747 is 9

Step 1: Since 81 > 72, we apply the division lemma to 81 and 72, to get

81 = 72 x 1 + 9

Step 2: Since the reminder 72 ≠ 0, we apply division lemma to 9 and 72, 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 72 and 81 is 9

Notice that 9 = HCF(72,9) = HCF(81,72) .


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

Step 1: Since 747 > 9, we apply the division lemma to 747 and 9, to get

747 = 9 x 83 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 9, the HCF of 9 and 747 is 9

Notice that 9 = HCF(747,9) .

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Frequently Asked Questions on HCF of 72, 81, 747 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 72, 81, 747?

Answer: HCF of 72, 81, 747 is 9 the largest number that divides all the numbers leaving a remainder zero.

3. How to find HCF of 72, 81, 747 using Euclid's Algorithm?

Answer: For arbitrary numbers 72, 81, 747 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.