Highest Common Factor of 20, 749, 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 20, 749, 821 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 20, 749, 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 20, 749, 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 20, 749, 821 is 1.
HCF(20, 749, 821) = 1
HCF of 20, 749, 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 20, 749, 821 is 1.
Highest Common Factor of 20,749,821 is 1
Step 1: Since 749 > 20, we apply the division lemma to 749 and 20, to get
749 = 20 x 37 + 9
Step 2: Since the reminder 20 ≠ 0, we apply division lemma to 9 and 20, to get
20 = 9 x 2 + 2
Step 3: We consider the new divisor 9 and the new remainder 2, and apply the division lemma to get
9 = 2 x 4 + 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 20 and 749 is 1
Notice that 1 = HCF(2,1) = HCF(9,2) = HCF(20,9) = HCF(749,20) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 821 > 1, we apply the division lemma to 821 and 1, to get
821 = 1 x 821 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 1 and 821 is 1
Notice that 1 = HCF(821,1) .
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Frequently Asked Questions on HCF of 20, 749, 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 20, 749, 821?
Answer: HCF of 20, 749, 821 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 20, 749, 821 using Euclid's Algorithm?
Answer: For arbitrary numbers 20, 749, 821 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.