Highest Common Factor of 787, 638, 217 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 787, 638, 217 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 787, 638, 217 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 787, 638, 217 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 787, 638, 217 is 1.
HCF(787, 638, 217) = 1
HCF of 787, 638, 217 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 787, 638, 217 is 1.
Highest Common Factor of 787,638,217 is 1
Step 1: Since 787 > 638, we apply the division lemma to 787 and 638, to get
787 = 638 x 1 + 149
Step 2: Since the reminder 638 ≠ 0, we apply division lemma to 149 and 638, to get
638 = 149 x 4 + 42
Step 3: We consider the new divisor 149 and the new remainder 42, and apply the division lemma to get
149 = 42 x 3 + 23
We consider the new divisor 42 and the new remainder 23,and apply the division lemma to get
42 = 23 x 1 + 19
We consider the new divisor 23 and the new remainder 19,and apply the division lemma to get
23 = 19 x 1 + 4
We consider the new divisor 19 and the new remainder 4,and apply the division lemma to get
19 = 4 x 4 + 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 787 and 638 is 1
Notice that 1 = HCF(3,1) = HCF(4,3) = HCF(19,4) = HCF(23,19) = HCF(42,23) = HCF(149,42) = HCF(638,149) = HCF(787,638) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 217 > 1, we apply the division lemma to 217 and 1, to get
217 = 1 x 217 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 1 and 217 is 1
Notice that 1 = HCF(217,1) .
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Frequently Asked Questions on HCF of 787, 638, 217 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 787, 638, 217?
Answer: HCF of 787, 638, 217 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 787, 638, 217 using Euclid's Algorithm?
Answer: For arbitrary numbers 787, 638, 217 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.