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 645, 503, 432 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 645, 503, 432 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 645, 503, 432 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 645, 503, 432 is 1.
HCF(645, 503, 432) = 1
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 645, 503, 432 is 1.
Step 1: Since 645 > 503, we apply the division lemma to 645 and 503, to get
645 = 503 x 1 + 142
Step 2: Since the reminder 503 ≠ 0, we apply division lemma to 142 and 503, to get
503 = 142 x 3 + 77
Step 3: We consider the new divisor 142 and the new remainder 77, and apply the division lemma to get
142 = 77 x 1 + 65
We consider the new divisor 77 and the new remainder 65,and apply the division lemma to get
77 = 65 x 1 + 12
We consider the new divisor 65 and the new remainder 12,and apply the division lemma to get
65 = 12 x 5 + 5
We consider the new divisor 12 and the new remainder 5,and apply the division lemma to get
12 = 5 x 2 + 2
We consider the new divisor 5 and the new remainder 2,and apply the division lemma to get
5 = 2 x 2 + 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 645 and 503 is 1
Notice that 1 = HCF(2,1) = HCF(5,2) = HCF(12,5) = HCF(65,12) = HCF(77,65) = HCF(142,77) = HCF(503,142) = HCF(645,503) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 432 > 1, we apply the division lemma to 432 and 1, to get
432 = 1 x 432 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 1 and 432 is 1
Notice that 1 = HCF(432,1) .
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 645, 503, 432?
Answer: HCF of 645, 503, 432 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 645, 503, 432 using Euclid's Algorithm?
Answer: For arbitrary numbers 645, 503, 432 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.