Highest Common Factor of 643, 478, 698 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 643, 478, 698 i.e. 1 the largest integer that leaves a remainder zero for all numbers.

HCF of 643, 478, 698 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 643, 478, 698 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 643, 478, 698 is 1.

HCF(643, 478, 698) = 1

HCF of 643, 478, 698 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 643, 478, 698 is 1.

Highest Common Factor of 643,478,698 using Euclid's algorithm

Highest Common Factor of 643,478,698 is 1

Step 1: Since 643 > 478, we apply the division lemma to 643 and 478, to get

643 = 478 x 1 + 165

Step 2: Since the reminder 478 ≠ 0, we apply division lemma to 165 and 478, to get

478 = 165 x 2 + 148

Step 3: We consider the new divisor 165 and the new remainder 148, and apply the division lemma to get

165 = 148 x 1 + 17

We consider the new divisor 148 and the new remainder 17,and apply the division lemma to get

148 = 17 x 8 + 12

We consider the new divisor 17 and the new remainder 12,and apply the division lemma to get

17 = 12 x 1 + 5

We consider the new divisor 12 and the new remainder 5,and apply the division lemma to get

12 = 5 x 2 + 2

We consider the new divisor 5 and the new remainder 2,and apply the division lemma to get

5 = 2 x 2 + 1

We consider the new divisor 2 and the new remainder 1,and apply the division lemma to get

2 = 1 x 2 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 643 and 478 is 1

Notice that 1 = HCF(2,1) = HCF(5,2) = HCF(12,5) = HCF(17,12) = HCF(148,17) = HCF(165,148) = HCF(478,165) = HCF(643,478) .

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

Step 1: Since 698 > 1, we apply the division lemma to 698 and 1, to get

698 = 1 x 698 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 1 and 698 is 1

Notice that 1 = HCF(698,1) .

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Frequently Asked Questions on HCF of 643, 478, 698 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 643, 478, 698?

Answer: HCF of 643, 478, 698 is 1 the largest number that divides all the numbers leaving a remainder zero.

3. How to find HCF of 643, 478, 698 using Euclid's Algorithm?

Answer: For arbitrary numbers 643, 478, 698 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.