Highest Common Factor of 781, 950, 420 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 781, 950, 420 i.e. 1 the largest integer that leaves a remainder zero for all numbers.

HCF of 781, 950, 420 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 781, 950, 420 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 781, 950, 420 is 1.

HCF(781, 950, 420) = 1

HCF of 781, 950, 420 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 781, 950, 420 is 1.

Highest Common Factor of 781,950,420 using Euclid's algorithm

Highest Common Factor of 781,950,420 is 1

Step 1: Since 950 > 781, we apply the division lemma to 950 and 781, to get

950 = 781 x 1 + 169

Step 2: Since the reminder 781 ≠ 0, we apply division lemma to 169 and 781, to get

781 = 169 x 4 + 105

Step 3: We consider the new divisor 169 and the new remainder 105, and apply the division lemma to get

169 = 105 x 1 + 64

We consider the new divisor 105 and the new remainder 64,and apply the division lemma to get

105 = 64 x 1 + 41

We consider the new divisor 64 and the new remainder 41,and apply the division lemma to get

64 = 41 x 1 + 23

We consider the new divisor 41 and the new remainder 23,and apply the division lemma to get

41 = 23 x 1 + 18

We consider the new divisor 23 and the new remainder 18,and apply the division lemma to get

23 = 18 x 1 + 5

We consider the new divisor 18 and the new remainder 5,and apply the division lemma to get

18 = 5 x 3 + 3

We consider the new divisor 5 and the new remainder 3,and apply the division lemma to get

5 = 3 x 1 + 2

We consider the new divisor 3 and the new remainder 2,and apply the division lemma to get

3 = 2 x 1 + 1

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 781 and 950 is 1

Notice that 1 = HCF(2,1) = HCF(3,2) = HCF(5,3) = HCF(18,5) = HCF(23,18) = HCF(41,23) = HCF(64,41) = HCF(105,64) = HCF(169,105) = HCF(781,169) = HCF(950,781) .

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

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

420 = 1 x 420 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 1 and 420 is 1

Notice that 1 = HCF(420,1) .

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Frequently Asked Questions on HCF of 781, 950, 420 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 781, 950, 420?

Answer: HCF of 781, 950, 420 is 1 the largest number that divides all the numbers leaving a remainder zero.

3. How to find HCF of 781, 950, 420 using Euclid's Algorithm?

Answer: For arbitrary numbers 781, 950, 420 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.