Highest Common Factor of 789, 998, 646 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 789, 998, 646 i.e. 1 the largest integer that leaves a remainder zero for all numbers.

HCF of 789, 998, 646 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 789, 998, 646 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 789, 998, 646 is 1.

HCF(789, 998, 646) = 1

HCF of 789, 998, 646 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 789, 998, 646 is 1.

Highest Common Factor of 789,998,646 using Euclid's algorithm

Highest Common Factor of 789,998,646 is 1

Step 1: Since 998 > 789, we apply the division lemma to 998 and 789, to get

998 = 789 x 1 + 209

Step 2: Since the reminder 789 ≠ 0, we apply division lemma to 209 and 789, to get

789 = 209 x 3 + 162

Step 3: We consider the new divisor 209 and the new remainder 162, and apply the division lemma to get

209 = 162 x 1 + 47

We consider the new divisor 162 and the new remainder 47,and apply the division lemma to get

162 = 47 x 3 + 21

We consider the new divisor 47 and the new remainder 21,and apply the division lemma to get

47 = 21 x 2 + 5

We consider the new divisor 21 and the new remainder 5,and apply the division lemma to get

21 = 5 x 4 + 1

We consider the new divisor 5 and the new remainder 1,and apply the division lemma to get

5 = 1 x 5 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 789 and 998 is 1

Notice that 1 = HCF(5,1) = HCF(21,5) = HCF(47,21) = HCF(162,47) = HCF(209,162) = HCF(789,209) = HCF(998,789) .

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

Step 1: Since 646 > 1, we apply the division lemma to 646 and 1, to get

646 = 1 x 646 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 1 and 646 is 1

Notice that 1 = HCF(646,1) .

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Frequently Asked Questions on HCF of 789, 998, 646 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 789, 998, 646?

Answer: HCF of 789, 998, 646 is 1 the largest number that divides all the numbers leaving a remainder zero.

3. How to find HCF of 789, 998, 646 using Euclid's Algorithm?

Answer: For arbitrary numbers 789, 998, 646 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.