Highest Common Factor of 686, 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 686, 921 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 686, 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 686, 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 686, 921 is 1.
HCF(686, 921) = 1
HCF of 686, 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 686, 921 is 1.
Highest Common Factor of 686,921 is 1
Step 1: Since 921 > 686, we apply the division lemma to 921 and 686, to get
921 = 686 x 1 + 235
Step 2: Since the reminder 686 ≠ 0, we apply division lemma to 235 and 686, to get
686 = 235 x 2 + 216
Step 3: We consider the new divisor 235 and the new remainder 216, and apply the division lemma to get
235 = 216 x 1 + 19
We consider the new divisor 216 and the new remainder 19,and apply the division lemma to get
216 = 19 x 11 + 7
We consider the new divisor 19 and the new remainder 7,and apply the division lemma to get
19 = 7 x 2 + 5
We consider the new divisor 7 and the new remainder 5,and apply the division lemma to get
7 = 5 x 1 + 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 686 and 921 is 1
Notice that 1 = HCF(2,1) = HCF(5,2) = HCF(7,5) = HCF(19,7) = HCF(216,19) = HCF(235,216) = HCF(686,235) = HCF(921,686) .
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Frequently Asked Questions on HCF of 686, 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 686, 921?
Answer: HCF of 686, 921 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 686, 921 using Euclid's Algorithm?
Answer: For arbitrary numbers 686, 921 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.