Highest Common Factor of 399, 638, 787 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 399, 638, 787 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 399, 638, 787 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 399, 638, 787 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 399, 638, 787 is 1.
HCF(399, 638, 787) = 1
HCF of 399, 638, 787 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 399, 638, 787 is 1.
Highest Common Factor of 399,638,787 is 1
Step 1: Since 638 > 399, we apply the division lemma to 638 and 399, to get
638 = 399 x 1 + 239
Step 2: Since the reminder 399 ≠ 0, we apply division lemma to 239 and 399, to get
399 = 239 x 1 + 160
Step 3: We consider the new divisor 239 and the new remainder 160, and apply the division lemma to get
239 = 160 x 1 + 79
We consider the new divisor 160 and the new remainder 79,and apply the division lemma to get
160 = 79 x 2 + 2
We consider the new divisor 79 and the new remainder 2,and apply the division lemma to get
79 = 2 x 39 + 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 399 and 638 is 1
Notice that 1 = HCF(2,1) = HCF(79,2) = HCF(160,79) = HCF(239,160) = HCF(399,239) = HCF(638,399) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 787 > 1, we apply the division lemma to 787 and 1, to get
787 = 1 x 787 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 1 and 787 is 1
Notice that 1 = HCF(787,1) .
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Frequently Asked Questions on HCF of 399, 638, 787 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 399, 638, 787?
Answer: HCF of 399, 638, 787 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 399, 638, 787 using Euclid's Algorithm?
Answer: For arbitrary numbers 399, 638, 787 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.