Highest Common Factor of 420, 287, 897 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, 287, 897 i.e. 1 the largest integer that leaves a remainder zero for all numbers.

HCF of 420, 287, 897 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, 287, 897 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, 287, 897 is 1.

HCF(420, 287, 897) = 1

HCF of 420, 287, 897 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, 287, 897 is 1.

Highest Common Factor of 420,287,897 using Euclid's algorithm

Highest Common Factor of 420,287,897 is 1

Step 1: Since 420 > 287, we apply the division lemma to 420 and 287, to get

420 = 287 x 1 + 133

Step 2: Since the reminder 287 ≠ 0, we apply division lemma to 133 and 287, to get

287 = 133 x 2 + 21

Step 3: We consider the new divisor 133 and the new remainder 21, and apply the division lemma to get

133 = 21 x 6 + 7

We consider the new divisor 21 and the new remainder 7, and apply the division lemma to get

21 = 7 x 3 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 7, the HCF of 420 and 287 is 7

Notice that 7 = HCF(21,7) = HCF(133,21) = HCF(287,133) = HCF(420,287) .


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

Step 1: Since 897 > 7, we apply the division lemma to 897 and 7, to get

897 = 7 x 128 + 1

Step 2: Since the reminder 7 ≠ 0, we apply division lemma to 1 and 7, to get

7 = 1 x 7 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 7 and 897 is 1

Notice that 1 = HCF(7,1) = HCF(897,7) .

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Frequently Asked Questions on HCF of 420, 287, 897 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, 287, 897?

Answer: HCF of 420, 287, 897 is 1 the largest number that divides all the numbers leaving a remainder zero.

3. How to find HCF of 420, 287, 897 using Euclid's Algorithm?

Answer: For arbitrary numbers 420, 287, 897 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.