Highest Common Factor of 285, 770, 128 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 285, 770, 128 i.e. 1 the largest integer that leaves a remainder zero for all numbers.

HCF of 285, 770, 128 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 285, 770, 128 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 285, 770, 128 is 1.

HCF(285, 770, 128) = 1

HCF of 285, 770, 128 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 285, 770, 128 is 1.

Highest Common Factor of 285,770,128 using Euclid's algorithm

Highest Common Factor of 285,770,128 is 1

Step 1: Since 770 > 285, we apply the division lemma to 770 and 285, to get

770 = 285 x 2 + 200

Step 2: Since the reminder 285 ≠ 0, we apply division lemma to 200 and 285, to get

285 = 200 x 1 + 85

Step 3: We consider the new divisor 200 and the new remainder 85, and apply the division lemma to get

200 = 85 x 2 + 30

We consider the new divisor 85 and the new remainder 30,and apply the division lemma to get

85 = 30 x 2 + 25

We consider the new divisor 30 and the new remainder 25,and apply the division lemma to get

30 = 25 x 1 + 5

We consider the new divisor 25 and the new remainder 5,and apply the division lemma to get

25 = 5 x 5 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 5, the HCF of 285 and 770 is 5

Notice that 5 = HCF(25,5) = HCF(30,25) = HCF(85,30) = HCF(200,85) = HCF(285,200) = HCF(770,285) .

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

Step 1: Since 128 > 5, we apply the division lemma to 128 and 5, to get

128 = 5 x 25 + 3

Step 2: Since the reminder 5 ≠ 0, we apply division lemma to 3 and 5, to get

5 = 3 x 1 + 2

Step 3: 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 5 and 128 is 1

Notice that 1 = HCF(2,1) = HCF(3,2) = HCF(5,3) = HCF(128,5) .

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Frequently Asked Questions on HCF of 285, 770, 128 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 285, 770, 128?

Answer: HCF of 285, 770, 128 is 1 the largest number that divides all the numbers leaving a remainder zero.

3. How to find HCF of 285, 770, 128 using Euclid's Algorithm?

Answer: For arbitrary numbers 285, 770, 128 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.