Highest Common Factor of 555, 1821 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 555, 1821 i.e. 3 the largest integer that leaves a remainder zero for all numbers.
HCF of 555, 1821 is 3 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 555, 1821 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 555, 1821 is 3.
HCF(555, 1821) = 3
HCF of 555, 1821 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 555, 1821 is 3.
Highest Common Factor of 555,1821 is 3
Step 1: Since 1821 > 555, we apply the division lemma to 1821 and 555, to get
1821 = 555 x 3 + 156
Step 2: Since the reminder 555 ≠ 0, we apply division lemma to 156 and 555, to get
555 = 156 x 3 + 87
Step 3: We consider the new divisor 156 and the new remainder 87, and apply the division lemma to get
156 = 87 x 1 + 69
We consider the new divisor 87 and the new remainder 69,and apply the division lemma to get
87 = 69 x 1 + 18
We consider the new divisor 69 and the new remainder 18,and apply the division lemma to get
69 = 18 x 3 + 15
We consider the new divisor 18 and the new remainder 15,and apply the division lemma to get
18 = 15 x 1 + 3
We consider the new divisor 15 and the new remainder 3,and apply the division lemma to get
15 = 3 x 5 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 3, the HCF of 555 and 1821 is 3
Notice that 3 = HCF(15,3) = HCF(18,15) = HCF(69,18) = HCF(87,69) = HCF(156,87) = HCF(555,156) = HCF(1821,555) .
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Frequently Asked Questions on HCF of 555, 1821 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 555, 1821?
Answer: HCF of 555, 1821 is 3 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 555, 1821 using Euclid's Algorithm?
Answer: For arbitrary numbers 555, 1821 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.