Highest Common Factor of 821, 1790 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 821, 1790 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 821, 1790 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 821, 1790 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 821, 1790 is 1.
HCF(821, 1790) = 1
HCF of 821, 1790 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 821, 1790 is 1.
Highest Common Factor of 821,1790 is 1
Step 1: Since 1790 > 821, we apply the division lemma to 1790 and 821, to get
1790 = 821 x 2 + 148
Step 2: Since the reminder 821 ≠ 0, we apply division lemma to 148 and 821, to get
821 = 148 x 5 + 81
Step 3: We consider the new divisor 148 and the new remainder 81, and apply the division lemma to get
148 = 81 x 1 + 67
We consider the new divisor 81 and the new remainder 67,and apply the division lemma to get
81 = 67 x 1 + 14
We consider the new divisor 67 and the new remainder 14,and apply the division lemma to get
67 = 14 x 4 + 11
We consider the new divisor 14 and the new remainder 11,and apply the division lemma to get
14 = 11 x 1 + 3
We consider the new divisor 11 and the new remainder 3,and apply the division lemma to get
11 = 3 x 3 + 2
We consider the new divisor 3 and the new remainder 2,and apply the division lemma to get
3 = 2 x 1 + 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 821 and 1790 is 1
Notice that 1 = HCF(2,1) = HCF(3,2) = HCF(11,3) = HCF(14,11) = HCF(67,14) = HCF(81,67) = HCF(148,81) = HCF(821,148) = HCF(1790,821) .
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Frequently Asked Questions on HCF of 821, 1790 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 821, 1790?
Answer: HCF of 821, 1790 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 821, 1790 using Euclid's Algorithm?
Answer: For arbitrary numbers 821, 1790 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.