Highest Common Factor of 521, 686, 791 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 521, 686, 791 i.e. 1 the largest integer that leaves a remainder zero for all numbers.

HCF of 521, 686, 791 is 1 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 521, 686, 791 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 521, 686, 791 is 1.

HCF(521, 686, 791) = 1

HCF of 521, 686, 791 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 521, 686, 791 is 1.

Highest Common Factor of 521,686,791 using Euclid's algorithm

Highest Common Factor of 521,686,791 is 1

Step 1: Since 686 > 521, we apply the division lemma to 686 and 521, to get

686 = 521 x 1 + 165

Step 2: Since the reminder 521 ≠ 0, we apply division lemma to 165 and 521, to get

521 = 165 x 3 + 26

Step 3: We consider the new divisor 165 and the new remainder 26, and apply the division lemma to get

165 = 26 x 6 + 9

We consider the new divisor 26 and the new remainder 9,and apply the division lemma to get

26 = 9 x 2 + 8

We consider the new divisor 9 and the new remainder 8,and apply the division lemma to get

9 = 8 x 1 + 1

We consider the new divisor 8 and the new remainder 1,and apply the division lemma to get

8 = 1 x 8 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 521 and 686 is 1

Notice that 1 = HCF(8,1) = HCF(9,8) = HCF(26,9) = HCF(165,26) = HCF(521,165) = HCF(686,521) .

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

Step 1: Since 791 > 1, we apply the division lemma to 791 and 1, to get

791 = 1 x 791 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 1 and 791 is 1

Notice that 1 = HCF(791,1) .

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Frequently Asked Questions on HCF of 521, 686, 791 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 521, 686, 791?

Answer: HCF of 521, 686, 791 is 1 the largest number that divides all the numbers leaving a remainder zero.

3. How to find HCF of 521, 686, 791 using Euclid's Algorithm?

Answer: For arbitrary numbers 521, 686, 791 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.