Highest Common Factor of 643, 921, 784 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, 921, 784 i.e. 1 the largest integer that leaves a remainder zero for all numbers.

HCF of 643, 921, 784 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, 921, 784 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, 921, 784 is 1.

HCF(643, 921, 784) = 1

HCF of 643, 921, 784 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 643, 921, 784 is 1.

Highest Common Factor of 643,921,784 using Euclid's algorithm

Highest Common Factor of 643,921,784 is 1

Step 1: Since 921 > 643, we apply the division lemma to 921 and 643, to get

921 = 643 x 1 + 278

Step 2: Since the reminder 643 ≠ 0, we apply division lemma to 278 and 643, to get

643 = 278 x 2 + 87

Step 3: We consider the new divisor 278 and the new remainder 87, and apply the division lemma to get

278 = 87 x 3 + 17

We consider the new divisor 87 and the new remainder 17,and apply the division lemma to get

87 = 17 x 5 + 2

We consider the new divisor 17 and the new remainder 2,and apply the division lemma to get

17 = 2 x 8 + 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 643 and 921 is 1

Notice that 1 = HCF(2,1) = HCF(17,2) = HCF(87,17) = HCF(278,87) = HCF(643,278) = HCF(921,643) .

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

Step 1: Since 784 > 1, we apply the division lemma to 784 and 1, to get

784 = 1 x 784 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 1 and 784 is 1

Notice that 1 = HCF(784,1) .

HCF using Euclid's Algorithm Calculation Examples

Here are some samples of HCF using Euclid's Algorithm calculations.

Frequently Asked Questions on HCF of 643, 921, 784 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, 921, 784?

Answer: HCF of 643, 921, 784 is 1 the largest number that divides all the numbers leaving a remainder zero.

3. How to find HCF of 643, 921, 784 using Euclid's Algorithm?

Answer: For arbitrary numbers 643, 921, 784 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.