Highest Common Factor of 43, 71, 40 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 43, 71, 40 i.e. 1 the largest integer that leaves a remainder zero for all numbers.

HCF of 43, 71, 40 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 43, 71, 40 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 43, 71, 40 is 1.

HCF(43, 71, 40) = 1

HCF of 43, 71, 40 using Euclid's algorithm

Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.

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Highest common factor (HCF) of 43, 71, 40 is 1.

Highest Common Factor of 43,71,40 using Euclid's algorithm

Highest Common Factor of 43,71,40 is 1

Step 1: Since 71 > 43, we apply the division lemma to 71 and 43, to get

71 = 43 x 1 + 28

Step 2: Since the reminder 43 ≠ 0, we apply division lemma to 28 and 43, to get

43 = 28 x 1 + 15

Step 3: We consider the new divisor 28 and the new remainder 15, and apply the division lemma to get

28 = 15 x 1 + 13

We consider the new divisor 15 and the new remainder 13,and apply the division lemma to get

15 = 13 x 1 + 2

We consider the new divisor 13 and the new remainder 2,and apply the division lemma to get

13 = 2 x 6 + 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 43 and 71 is 1

Notice that 1 = HCF(2,1) = HCF(13,2) = HCF(15,13) = HCF(28,15) = HCF(43,28) = HCF(71,43) .

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

Step 1: Since 40 > 1, we apply the division lemma to 40 and 1, to get

40 = 1 x 40 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 1 and 40 is 1

Notice that 1 = HCF(40,1) .

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Frequently Asked Questions on HCF of 43, 71, 40 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 43, 71, 40?

Answer: HCF of 43, 71, 40 is 1 the largest number that divides all the numbers leaving a remainder zero.

3. How to find HCF of 43, 71, 40 using Euclid's Algorithm?

Answer: For arbitrary numbers 43, 71, 40 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.