Highest Common Factor of 689, 78 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 689, 78 i.e. 13 the largest integer that leaves a remainder zero for all numbers.

HCF of 689, 78 is 13 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 689, 78 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 689, 78 is 13.

HCF(689, 78) = 13

HCF of 689, 78 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 689, 78 is 13.

Highest Common Factor of 689,78 using Euclid's algorithm

Highest Common Factor of 689,78 is 13

Step 1: Since 689 > 78, we apply the division lemma to 689 and 78, to get

689 = 78 x 8 + 65

Step 2: Since the reminder 78 ≠ 0, we apply division lemma to 65 and 78, to get

78 = 65 x 1 + 13

Step 3: We consider the new divisor 65 and the new remainder 13, and apply the division lemma to get

65 = 13 x 5 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 13, the HCF of 689 and 78 is 13

Notice that 13 = HCF(65,13) = HCF(78,65) = HCF(689,78) .

HCF using Euclid's Algorithm Calculation Examples

Here are some samples of HCF using Euclid's Algorithm calculations.

Frequently Asked Questions on HCF of 689, 78 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 689, 78?

Answer: HCF of 689, 78 is 13 the largest number that divides all the numbers leaving a remainder zero.

3. How to find HCF of 689, 78 using Euclid's Algorithm?

Answer: For arbitrary numbers 689, 78 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.