Highest Common Factor of 646, 438, 655 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 646, 438, 655 i.e. 1 the largest integer that leaves a remainder zero for all numbers.

HCF of 646, 438, 655 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 646, 438, 655 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 646, 438, 655 is 1.

HCF(646, 438, 655) = 1

HCF of 646, 438, 655 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 646, 438, 655 is 1.

Highest Common Factor of 646,438,655 using Euclid's algorithm

Highest Common Factor of 646,438,655 is 1

Step 1: Since 646 > 438, we apply the division lemma to 646 and 438, to get

646 = 438 x 1 + 208

Step 2: Since the reminder 438 ≠ 0, we apply division lemma to 208 and 438, to get

438 = 208 x 2 + 22

Step 3: We consider the new divisor 208 and the new remainder 22, and apply the division lemma to get

208 = 22 x 9 + 10

We consider the new divisor 22 and the new remainder 10,and apply the division lemma to get

22 = 10 x 2 + 2

We consider the new divisor 10 and the new remainder 2,and apply the division lemma to get

10 = 2 x 5 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 2, the HCF of 646 and 438 is 2

Notice that 2 = HCF(10,2) = HCF(22,10) = HCF(208,22) = HCF(438,208) = HCF(646,438) .

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

Step 1: Since 655 > 2, we apply the division lemma to 655 and 2, to get

655 = 2 x 327 + 1

Step 2: Since the reminder 2 ≠ 0, we apply division lemma to 1 and 2, 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 2 and 655 is 1

Notice that 1 = HCF(2,1) = HCF(655,2) .

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Frequently Asked Questions on HCF of 646, 438, 655 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 646, 438, 655?

Answer: HCF of 646, 438, 655 is 1 the largest number that divides all the numbers leaving a remainder zero.

3. How to find HCF of 646, 438, 655 using Euclid's Algorithm?

Answer: For arbitrary numbers 646, 438, 655 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.