Highest Common Factor of 643, 989, 782 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 643, 989, 782 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 643, 989, 782 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, 989, 782 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, 989, 782 is 1.
HCF(643, 989, 782) = 1
HCF of 643, 989, 782 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 643, 989, 782 is 1.
Highest Common Factor of 643,989,782 is 1
Step 1: Since 989 > 643, we apply the division lemma to 989 and 643, to get
989 = 643 x 1 + 346
Step 2: Since the reminder 643 ≠ 0, we apply division lemma to 346 and 643, to get
643 = 346 x 1 + 297
Step 3: We consider the new divisor 346 and the new remainder 297, and apply the division lemma to get
346 = 297 x 1 + 49
We consider the new divisor 297 and the new remainder 49,and apply the division lemma to get
297 = 49 x 6 + 3
We consider the new divisor 49 and the new remainder 3,and apply the division lemma to get
49 = 3 x 16 + 1
We consider the new divisor 3 and the new remainder 1,and apply the division lemma to get
3 = 1 x 3 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 643 and 989 is 1
Notice that 1 = HCF(3,1) = HCF(49,3) = HCF(297,49) = HCF(346,297) = HCF(643,346) = HCF(989,643) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 782 > 1, we apply the division lemma to 782 and 1, to get
782 = 1 x 782 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 1 and 782 is 1
Notice that 1 = HCF(782,1) .
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Frequently Asked Questions on HCF of 643, 989, 782 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 643, 989, 782?
Answer: HCF of 643, 989, 782 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 643, 989, 782 using Euclid's Algorithm?
Answer: For arbitrary numbers 643, 989, 782 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.
