Highest Common Factor of 665, 397, 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 665, 397, 921 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 665, 397, 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 665, 397, 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 665, 397, 921 is 1.
HCF(665, 397, 921) = 1
HCF of 665, 397, 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 665, 397, 921 is 1.
Highest Common Factor of 665,397,921 is 1
Step 1: Since 665 > 397, we apply the division lemma to 665 and 397, to get
665 = 397 x 1 + 268
Step 2: Since the reminder 397 ≠ 0, we apply division lemma to 268 and 397, to get
397 = 268 x 1 + 129
Step 3: We consider the new divisor 268 and the new remainder 129, and apply the division lemma to get
268 = 129 x 2 + 10
We consider the new divisor 129 and the new remainder 10,and apply the division lemma to get
129 = 10 x 12 + 9
We consider the new divisor 10 and the new remainder 9,and apply the division lemma to get
10 = 9 x 1 + 1
We consider the new divisor 9 and the new remainder 1,and apply the division lemma to get
9 = 1 x 9 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 665 and 397 is 1
Notice that 1 = HCF(9,1) = HCF(10,9) = HCF(129,10) = HCF(268,129) = HCF(397,268) = HCF(665,397) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 921 > 1, we apply the division lemma to 921 and 1, to get
921 = 1 x 921 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 1 and 921 is 1
Notice that 1 = HCF(921,1) .
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Frequently Asked Questions on HCF of 665, 397, 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 665, 397, 921?
Answer: HCF of 665, 397, 921 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 665, 397, 921 using Euclid's Algorithm?
Answer: For arbitrary numbers 665, 397, 921 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.