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 643, 181, 497 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 643, 181, 497 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 643, 181, 497 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 643, 181, 497 is 1.
HCF(643, 181, 497) = 1
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 643, 181, 497 is 1.
Step 1: Since 643 > 181, we apply the division lemma to 643 and 181, to get
643 = 181 x 3 + 100
Step 2: Since the reminder 181 ≠ 0, we apply division lemma to 100 and 181, to get
181 = 100 x 1 + 81
Step 3: We consider the new divisor 100 and the new remainder 81, and apply the division lemma to get
100 = 81 x 1 + 19
We consider the new divisor 81 and the new remainder 19,and apply the division lemma to get
81 = 19 x 4 + 5
We consider the new divisor 19 and the new remainder 5,and apply the division lemma to get
19 = 5 x 3 + 4
We consider the new divisor 5 and the new remainder 4,and apply the division lemma to get
5 = 4 x 1 + 1
We consider the new divisor 4 and the new remainder 1,and apply the division lemma to get
4 = 1 x 4 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 643 and 181 is 1
Notice that 1 = HCF(4,1) = HCF(5,4) = HCF(19,5) = HCF(81,19) = HCF(100,81) = HCF(181,100) = HCF(643,181) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 497 > 1, we apply the division lemma to 497 and 1, to get
497 = 1 x 497 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 1 and 497 is 1
Notice that 1 = HCF(497,1) .
Here are some samples of HCF using Euclid's Algorithm calculations.
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 643, 181, 497?
Answer: HCF of 643, 181, 497 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 643, 181, 497 using Euclid's Algorithm?
Answer: For arbitrary numbers 643, 181, 497 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.