Highest Common Factor of 390, 855, 491 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 390, 855, 491 i.e. 1 the largest integer that leaves a remainder zero for all numbers.

HCF of 390, 855, 491 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 390, 855, 491 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 390, 855, 491 is 1.

HCF(390, 855, 491) = 1

HCF of 390, 855, 491 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 390, 855, 491 is 1.

Highest Common Factor of 390,855,491 using Euclid's algorithm

Highest Common Factor of 390,855,491 is 1

Step 1: Since 855 > 390, we apply the division lemma to 855 and 390, to get

855 = 390 x 2 + 75

Step 2: Since the reminder 390 ≠ 0, we apply division lemma to 75 and 390, to get

390 = 75 x 5 + 15

Step 3: We consider the new divisor 75 and the new remainder 15, and apply the division lemma to get

75 = 15 x 5 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 15, the HCF of 390 and 855 is 15

Notice that 15 = HCF(75,15) = HCF(390,75) = HCF(855,390) .

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

Step 1: Since 491 > 15, we apply the division lemma to 491 and 15, to get

491 = 15 x 32 + 11

Step 2: Since the reminder 15 ≠ 0, we apply division lemma to 11 and 15, to get

15 = 11 x 1 + 4

Step 3: We consider the new divisor 11 and the new remainder 4, and apply the division lemma to get

11 = 4 x 2 + 3

We consider the new divisor 4 and the new remainder 3,and apply the division lemma to get

4 = 3 x 1 + 1

We consider the new divisor 3 and the new remainder 1,and apply the division lemma to get

3 = 1 x 3 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 15 and 491 is 1

Notice that 1 = HCF(3,1) = HCF(4,3) = HCF(11,4) = HCF(15,11) = HCF(491,15) .

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Frequently Asked Questions on HCF of 390, 855, 491 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 390, 855, 491?

Answer: HCF of 390, 855, 491 is 1 the largest number that divides all the numbers leaving a remainder zero.

3. How to find HCF of 390, 855, 491 using Euclid's Algorithm?

Answer: For arbitrary numbers 390, 855, 491 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.