Highest Common Factor of 644, 685 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 644, 685 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 644, 685 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 644, 685 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 644, 685 is 1.
HCF(644, 685) = 1
HCF of 644, 685 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 644, 685 is 1.
Highest Common Factor of 644,685 is 1
Step 1: Since 685 > 644, we apply the division lemma to 685 and 644, to get
685 = 644 x 1 + 41
Step 2: Since the reminder 644 ≠ 0, we apply division lemma to 41 and 644, to get
644 = 41 x 15 + 29
Step 3: We consider the new divisor 41 and the new remainder 29, and apply the division lemma to get
41 = 29 x 1 + 12
We consider the new divisor 29 and the new remainder 12,and apply the division lemma to get
29 = 12 x 2 + 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 644 and 685 is 1
Notice that 1 = HCF(2,1) = HCF(5,2) = HCF(12,5) = HCF(29,12) = HCF(41,29) = HCF(644,41) = HCF(685,644) .
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Frequently Asked Questions on HCF of 644, 685 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 644, 685?
Answer: HCF of 644, 685 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 644, 685 using Euclid's Algorithm?
Answer: For arbitrary numbers 644, 685 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.