Highest Common Factor of 487, 821 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 487, 821 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 487, 821 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 487, 821 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 487, 821 is 1.
HCF(487, 821) = 1
HCF of 487, 821 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 487, 821 is 1.
Highest Common Factor of 487,821 is 1
Step 1: Since 821 > 487, we apply the division lemma to 821 and 487, to get
821 = 487 x 1 + 334
Step 2: Since the reminder 487 ≠ 0, we apply division lemma to 334 and 487, to get
487 = 334 x 1 + 153
Step 3: We consider the new divisor 334 and the new remainder 153, and apply the division lemma to get
334 = 153 x 2 + 28
We consider the new divisor 153 and the new remainder 28,and apply the division lemma to get
153 = 28 x 5 + 13
We consider the new divisor 28 and the new remainder 13,and apply the division lemma to get
28 = 13 x 2 + 2
We consider the new divisor 13 and the new remainder 2,and apply the division lemma to get
13 = 2 x 6 + 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 487 and 821 is 1
Notice that 1 = HCF(2,1) = HCF(13,2) = HCF(28,13) = HCF(153,28) = HCF(334,153) = HCF(487,334) = HCF(821,487) .
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Frequently Asked Questions on HCF of 487, 821 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 487, 821?
Answer: HCF of 487, 821 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 487, 821 using Euclid's Algorithm?
Answer: For arbitrary numbers 487, 821 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.