Highest Common Factor of 642, 820, 656 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 642, 820, 656 i.e. 2 the largest integer that leaves a remainder zero for all numbers.
HCF of 642, 820, 656 is 2 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 642, 820, 656 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 642, 820, 656 is 2.
HCF(642, 820, 656) = 2
HCF of 642, 820, 656 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 642, 820, 656 is 2.
Highest Common Factor of 642,820,656 is 2
Step 1: Since 820 > 642, we apply the division lemma to 820 and 642, to get
820 = 642 x 1 + 178
Step 2: Since the reminder 642 ≠ 0, we apply division lemma to 178 and 642, to get
642 = 178 x 3 + 108
Step 3: We consider the new divisor 178 and the new remainder 108, and apply the division lemma to get
178 = 108 x 1 + 70
We consider the new divisor 108 and the new remainder 70,and apply the division lemma to get
108 = 70 x 1 + 38
We consider the new divisor 70 and the new remainder 38,and apply the division lemma to get
70 = 38 x 1 + 32
We consider the new divisor 38 and the new remainder 32,and apply the division lemma to get
38 = 32 x 1 + 6
We consider the new divisor 32 and the new remainder 6,and apply the division lemma to get
32 = 6 x 5 + 2
We consider the new divisor 6 and the new remainder 2,and apply the division lemma to get
6 = 2 x 3 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 2, the HCF of 642 and 820 is 2
Notice that 2 = HCF(6,2) = HCF(32,6) = HCF(38,32) = HCF(70,38) = HCF(108,70) = HCF(178,108) = HCF(642,178) = HCF(820,642) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 656 > 2, we apply the division lemma to 656 and 2, to get
656 = 2 x 328 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 2, the HCF of 2 and 656 is 2
Notice that 2 = HCF(656,2) .
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Frequently Asked Questions on HCF of 642, 820, 656 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 642, 820, 656?
Answer: HCF of 642, 820, 656 is 2 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 642, 820, 656 using Euclid's Algorithm?
Answer: For arbitrary numbers 642, 820, 656 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.