Highest Common Factor of 647, 921 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 647, 921 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 647, 921 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 647, 921 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 647, 921 is 1.
HCF(647, 921) = 1
HCF of 647, 921 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 647, 921 is 1.
Highest Common Factor of 647,921 is 1
Step 1: Since 921 > 647, we apply the division lemma to 921 and 647, to get
921 = 647 x 1 + 274
Step 2: Since the reminder 647 ≠ 0, we apply division lemma to 274 and 647, to get
647 = 274 x 2 + 99
Step 3: We consider the new divisor 274 and the new remainder 99, and apply the division lemma to get
274 = 99 x 2 + 76
We consider the new divisor 99 and the new remainder 76,and apply the division lemma to get
99 = 76 x 1 + 23
We consider the new divisor 76 and the new remainder 23,and apply the division lemma to get
76 = 23 x 3 + 7
We consider the new divisor 23 and the new remainder 7,and apply the division lemma to get
23 = 7 x 3 + 2
We consider the new divisor 7 and the new remainder 2,and apply the division lemma to get
7 = 2 x 3 + 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 647 and 921 is 1
Notice that 1 = HCF(2,1) = HCF(7,2) = HCF(23,7) = HCF(76,23) = HCF(99,76) = HCF(274,99) = HCF(647,274) = HCF(921,647) .
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Frequently Asked Questions on HCF of 647, 921 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 647, 921?
Answer: HCF of 647, 921 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 647, 921 using Euclid's Algorithm?
Answer: For arbitrary numbers 647, 921 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.