Highest Common Factor of 621, 644, 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 621, 644, 791 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 621, 644, 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 621, 644, 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 621, 644, 791 is 1.
HCF(621, 644, 791) = 1
HCF of 621, 644, 791 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 621, 644, 791 is 1.
Highest Common Factor of 621,644,791 is 1
Step 1: Since 644 > 621, we apply the division lemma to 644 and 621, to get
644 = 621 x 1 + 23
Step 2: Since the reminder 621 ≠ 0, we apply division lemma to 23 and 621, to get
621 = 23 x 27 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 23, the HCF of 621 and 644 is 23
Notice that 23 = HCF(621,23) = HCF(644,621) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 791 > 23, we apply the division lemma to 791 and 23, to get
791 = 23 x 34 + 9
Step 2: Since the reminder 23 ≠ 0, we apply division lemma to 9 and 23, to get
23 = 9 x 2 + 5
Step 3: We consider the new divisor 9 and the new remainder 5, and apply the division lemma to get
9 = 5 x 1 + 4
We consider the new divisor 5 and the new remainder 4,and apply the division lemma to get
5 = 4 x 1 + 1
We consider the new divisor 4 and the new remainder 1,and apply the division lemma to get
4 = 1 x 4 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 23 and 791 is 1
Notice that 1 = HCF(4,1) = HCF(5,4) = HCF(9,5) = HCF(23,9) = HCF(791,23) .
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Frequently Asked Questions on HCF of 621, 644, 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 621, 644, 791?
Answer: HCF of 621, 644, 791 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 621, 644, 791 using Euclid's Algorithm?
Answer: For arbitrary numbers 621, 644, 791 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.