Highest Common Factor of 780, 417, 686 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 780, 417, 686 i.e. 1 the largest integer that leaves a remainder zero for all numbers.

HCF of 780, 417, 686 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 780, 417, 686 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 780, 417, 686 is 1.

HCF(780, 417, 686) = 1

HCF of 780, 417, 686 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 780, 417, 686 is 1.

Highest Common Factor of 780,417,686 using Euclid's algorithm

Highest Common Factor of 780,417,686 is 1

Step 1: Since 780 > 417, we apply the division lemma to 780 and 417, to get

780 = 417 x 1 + 363

Step 2: Since the reminder 417 ≠ 0, we apply division lemma to 363 and 417, to get

417 = 363 x 1 + 54

Step 3: We consider the new divisor 363 and the new remainder 54, and apply the division lemma to get

363 = 54 x 6 + 39

We consider the new divisor 54 and the new remainder 39,and apply the division lemma to get

54 = 39 x 1 + 15

We consider the new divisor 39 and the new remainder 15,and apply the division lemma to get

39 = 15 x 2 + 9

We consider the new divisor 15 and the new remainder 9,and apply the division lemma to get

15 = 9 x 1 + 6

We consider the new divisor 9 and the new remainder 6,and apply the division lemma to get

9 = 6 x 1 + 3

We consider the new divisor 6 and the new remainder 3,and apply the division lemma to get

6 = 3 x 2 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 3, the HCF of 780 and 417 is 3

Notice that 3 = HCF(6,3) = HCF(9,6) = HCF(15,9) = HCF(39,15) = HCF(54,39) = HCF(363,54) = HCF(417,363) = HCF(780,417) .

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

Step 1: Since 686 > 3, we apply the division lemma to 686 and 3, to get

686 = 3 x 228 + 2

Step 2: Since the reminder 3 ≠ 0, we apply division lemma to 2 and 3, to get

3 = 2 x 1 + 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 3 and 686 is 1

Notice that 1 = HCF(2,1) = HCF(3,2) = HCF(686,3) .

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Frequently Asked Questions on HCF of 780, 417, 686 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 780, 417, 686?

Answer: HCF of 780, 417, 686 is 1 the largest number that divides all the numbers leaving a remainder zero.

3. How to find HCF of 780, 417, 686 using Euclid's Algorithm?

Answer: For arbitrary numbers 780, 417, 686 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.