Highest Common Factor of 420, 635, 247, 205 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 420, 635, 247, 205 i.e. 1 the largest integer that leaves a remainder zero for all numbers.

HCF of 420, 635, 247, 205 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 420, 635, 247, 205 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 420, 635, 247, 205 is 1.

HCF(420, 635, 247, 205) = 1

HCF of 420, 635, 247, 205 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 420, 635, 247, 205 is 1.

Highest Common Factor of 420,635,247,205 using Euclid's algorithm

Highest Common Factor of 420,635,247,205 is 1

Step 1: Since 635 > 420, we apply the division lemma to 635 and 420, to get

635 = 420 x 1 + 215

Step 2: Since the reminder 420 ≠ 0, we apply division lemma to 215 and 420, to get

420 = 215 x 1 + 205

Step 3: We consider the new divisor 215 and the new remainder 205, and apply the division lemma to get

215 = 205 x 1 + 10

We consider the new divisor 205 and the new remainder 10,and apply the division lemma to get

205 = 10 x 20 + 5

We consider the new divisor 10 and the new remainder 5,and apply the division lemma to get

10 = 5 x 2 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 5, the HCF of 420 and 635 is 5

Notice that 5 = HCF(10,5) = HCF(205,10) = HCF(215,205) = HCF(420,215) = HCF(635,420) .

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

Step 1: Since 247 > 5, we apply the division lemma to 247 and 5, to get

247 = 5 x 49 + 2

Step 2: Since the reminder 5 ≠ 0, we apply division lemma to 2 and 5, to get

5 = 2 x 2 + 1

Step 3: 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 5 and 247 is 1

Notice that 1 = HCF(2,1) = HCF(5,2) = HCF(247,5) .

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

Step 1: Since 205 > 1, we apply the division lemma to 205 and 1, to get

205 = 1 x 205 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 1 and 205 is 1

Notice that 1 = HCF(205,1) .

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Frequently Asked Questions on HCF of 420, 635, 247, 205 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 420, 635, 247, 205?

Answer: HCF of 420, 635, 247, 205 is 1 the largest number that divides all the numbers leaving a remainder zero.

3. How to find HCF of 420, 635, 247, 205 using Euclid's Algorithm?

Answer: For arbitrary numbers 420, 635, 247, 205 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.