Highest Common Factor of 123, 691 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 123, 691 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 123, 691 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 123, 691 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 123, 691 is 1.
HCF(123, 691) = 1
HCF of 123, 691 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 123, 691 is 1.
Highest Common Factor of 123,691 is 1
Step 1: Since 691 > 123, we apply the division lemma to 691 and 123, to get
691 = 123 x 5 + 76
Step 2: Since the reminder 123 ≠ 0, we apply division lemma to 76 and 123, to get
123 = 76 x 1 + 47
Step 3: We consider the new divisor 76 and the new remainder 47, and apply the division lemma to get
76 = 47 x 1 + 29
We consider the new divisor 47 and the new remainder 29,and apply the division lemma to get
47 = 29 x 1 + 18
We consider the new divisor 29 and the new remainder 18,and apply the division lemma to get
29 = 18 x 1 + 11
We consider the new divisor 18 and the new remainder 11,and apply the division lemma to get
18 = 11 x 1 + 7
We consider the new divisor 11 and the new remainder 7,and apply the division lemma to get
11 = 7 x 1 + 4
We consider the new divisor 7 and the new remainder 4,and apply the division lemma to get
7 = 4 x 1 + 3
We consider the new divisor 4 and the new remainder 3,and apply the division lemma to get
4 = 3 x 1 + 1
We consider the new divisor 3 and the new remainder 1,and apply the division lemma to get
3 = 1 x 3 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 123 and 691 is 1
Notice that 1 = HCF(3,1) = HCF(4,3) = HCF(7,4) = HCF(11,7) = HCF(18,11) = HCF(29,18) = HCF(47,29) = HCF(76,47) = HCF(123,76) = HCF(691,123) .
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Frequently Asked Questions on HCF of 123, 691 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 123, 691?
Answer: HCF of 123, 691 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 123, 691 using Euclid's Algorithm?
Answer: For arbitrary numbers 123, 691 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.