Highest Common Factor of 291, 805, 643 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 291, 805, 643 i.e. 1 the largest integer that leaves a remainder zero for all numbers.

HCF of 291, 805, 643 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 291, 805, 643 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 291, 805, 643 is 1.

HCF(291, 805, 643) = 1

HCF of 291, 805, 643 using Euclid's algorithm

Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.

HCF of:

Highest common factor (HCF) of 291, 805, 643 is 1.

Highest Common Factor of 291,805,643 using Euclid's algorithm

Highest Common Factor of 291,805,643 is 1

Step 1: Since 805 > 291, we apply the division lemma to 805 and 291, to get

805 = 291 x 2 + 223

Step 2: Since the reminder 291 ≠ 0, we apply division lemma to 223 and 291, to get

291 = 223 x 1 + 68

Step 3: We consider the new divisor 223 and the new remainder 68, and apply the division lemma to get

223 = 68 x 3 + 19

We consider the new divisor 68 and the new remainder 19,and apply the division lemma to get

68 = 19 x 3 + 11

We consider the new divisor 19 and the new remainder 11,and apply the division lemma to get

19 = 11 x 1 + 8

We consider the new divisor 11 and the new remainder 8,and apply the division lemma to get

11 = 8 x 1 + 3

We consider the new divisor 8 and the new remainder 3,and apply the division lemma to get

8 = 3 x 2 + 2

We consider the new divisor 3 and the new remainder 2,and apply the division lemma to get

3 = 2 x 1 + 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 291 and 805 is 1

Notice that 1 = HCF(2,1) = HCF(3,2) = HCF(8,3) = HCF(11,8) = HCF(19,11) = HCF(68,19) = HCF(223,68) = HCF(291,223) = HCF(805,291) .

We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma

Step 1: Since 643 > 1, we apply the division lemma to 643 and 1, to get

643 = 1 x 643 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 1 and 643 is 1

Notice that 1 = HCF(643,1) .

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Frequently Asked Questions on HCF of 291, 805, 643 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 291, 805, 643?

Answer: HCF of 291, 805, 643 is 1 the largest number that divides all the numbers leaving a remainder zero.

3. How to find HCF of 291, 805, 643 using Euclid's Algorithm?

Answer: For arbitrary numbers 291, 805, 643 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.