Highest Common Factor of 121, 687, 149 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 121, 687, 149 i.e. 1 the largest integer that leaves a remainder zero for all numbers.

HCF of 121, 687, 149 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 121, 687, 149 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 121, 687, 149 is 1.

HCF(121, 687, 149) = 1

HCF of 121, 687, 149 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 121, 687, 149 is 1.

Highest Common Factor of 121,687,149 using Euclid's algorithm

Highest Common Factor of 121,687,149 is 1

Step 1: Since 687 > 121, we apply the division lemma to 687 and 121, to get

687 = 121 x 5 + 82

Step 2: Since the reminder 121 ≠ 0, we apply division lemma to 82 and 121, to get

121 = 82 x 1 + 39

Step 3: We consider the new divisor 82 and the new remainder 39, and apply the division lemma to get

82 = 39 x 2 + 4

We consider the new divisor 39 and the new remainder 4,and apply the division lemma to get

39 = 4 x 9 + 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 121 and 687 is 1

Notice that 1 = HCF(3,1) = HCF(4,3) = HCF(39,4) = HCF(82,39) = HCF(121,82) = HCF(687,121) .

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

Step 1: Since 149 > 1, we apply the division lemma to 149 and 1, to get

149 = 1 x 149 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 1 and 149 is 1

Notice that 1 = HCF(149,1) .

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Frequently Asked Questions on HCF of 121, 687, 149 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 121, 687, 149?

Answer: HCF of 121, 687, 149 is 1 the largest number that divides all the numbers leaving a remainder zero.

3. How to find HCF of 121, 687, 149 using Euclid's Algorithm?

Answer: For arbitrary numbers 121, 687, 149 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.