Highest Common Factor of 247, 817, 645 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 247, 817, 645 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 247, 817, 645 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 247, 817, 645 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 247, 817, 645 is 1.
HCF(247, 817, 645) = 1
HCF of 247, 817, 645 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 247, 817, 645 is 1.
Highest Common Factor of 247,817,645 is 1
Step 1: Since 817 > 247, we apply the division lemma to 817 and 247, to get
817 = 247 x 3 + 76
Step 2: Since the reminder 247 ≠ 0, we apply division lemma to 76 and 247, to get
247 = 76 x 3 + 19
Step 3: We consider the new divisor 76 and the new remainder 19, and apply the division lemma to get
76 = 19 x 4 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 19, the HCF of 247 and 817 is 19
Notice that 19 = HCF(76,19) = HCF(247,76) = HCF(817,247) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 645 > 19, we apply the division lemma to 645 and 19, to get
645 = 19 x 33 + 18
Step 2: Since the reminder 19 ≠ 0, we apply division lemma to 18 and 19, to get
19 = 18 x 1 + 1
Step 3: We consider the new divisor 18 and the new remainder 1, and apply the division lemma to get
18 = 1 x 18 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 19 and 645 is 1
Notice that 1 = HCF(18,1) = HCF(19,18) = HCF(645,19) .
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Frequently Asked Questions on HCF of 247, 817, 645 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 247, 817, 645?
Answer: HCF of 247, 817, 645 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 247, 817, 645 using Euclid's Algorithm?
Answer: For arbitrary numbers 247, 817, 645 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.