Highest Common Factor of 791, 121, 77 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 791, 121, 77 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 791, 121, 77 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 791, 121, 77 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 791, 121, 77 is 1.
HCF(791, 121, 77) = 1
HCF of 791, 121, 77 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 791, 121, 77 is 1.
Highest Common Factor of 791,121,77 is 1
Step 1: Since 791 > 121, we apply the division lemma to 791 and 121, to get
791 = 121 x 6 + 65
Step 2: Since the reminder 121 ≠ 0, we apply division lemma to 65 and 121, to get
121 = 65 x 1 + 56
Step 3: We consider the new divisor 65 and the new remainder 56, and apply the division lemma to get
65 = 56 x 1 + 9
We consider the new divisor 56 and the new remainder 9,and apply the division lemma to get
56 = 9 x 6 + 2
We consider the new divisor 9 and the new remainder 2,and apply the division lemma to get
9 = 2 x 4 + 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 791 and 121 is 1
Notice that 1 = HCF(2,1) = HCF(9,2) = HCF(56,9) = HCF(65,56) = HCF(121,65) = HCF(791,121) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 77 > 1, we apply the division lemma to 77 and 1, to get
77 = 1 x 77 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 1 and 77 is 1
Notice that 1 = HCF(77,1) .
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Frequently Asked Questions on HCF of 791, 121, 77 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 791, 121, 77?
Answer: HCF of 791, 121, 77 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 791, 121, 77 using Euclid's Algorithm?
Answer: For arbitrary numbers 791, 121, 77 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.