Highest Common Factor of 643, 817 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, 817 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 643, 817 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, 817 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, 817 is 1.
HCF(643, 817) = 1
HCF of 643, 817 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 643, 817 is 1.
Highest Common Factor of 643,817 is 1
Step 1: Since 817 > 643, we apply the division lemma to 817 and 643, to get
817 = 643 x 1 + 174
Step 2: Since the reminder 643 ≠ 0, we apply division lemma to 174 and 643, to get
643 = 174 x 3 + 121
Step 3: We consider the new divisor 174 and the new remainder 121, and apply the division lemma to get
174 = 121 x 1 + 53
We consider the new divisor 121 and the new remainder 53,and apply the division lemma to get
121 = 53 x 2 + 15
We consider the new divisor 53 and the new remainder 15,and apply the division lemma to get
53 = 15 x 3 + 8
We consider the new divisor 15 and the new remainder 8,and apply the division lemma to get
15 = 8 x 1 + 7
We consider the new divisor 8 and the new remainder 7,and apply the division lemma to get
8 = 7 x 1 + 1
We consider the new divisor 7 and the new remainder 1,and apply the division lemma to get
7 = 1 x 7 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 643 and 817 is 1
Notice that 1 = HCF(7,1) = HCF(8,7) = HCF(15,8) = HCF(53,15) = HCF(121,53) = HCF(174,121) = HCF(643,174) = HCF(817,643) .
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Frequently Asked Questions on HCF of 643, 817 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, 817?
Answer: HCF of 643, 817 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 643, 817 using Euclid's Algorithm?
Answer: For arbitrary numbers 643, 817 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.