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 781, 515, 79 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 781, 515, 79 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 781, 515, 79 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 781, 515, 79 is 1.
HCF(781, 515, 79) = 1
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 781, 515, 79 is 1.
Step 1: Since 781 > 515, we apply the division lemma to 781 and 515, to get
781 = 515 x 1 + 266
Step 2: Since the reminder 515 ≠ 0, we apply division lemma to 266 and 515, to get
515 = 266 x 1 + 249
Step 3: We consider the new divisor 266 and the new remainder 249, and apply the division lemma to get
266 = 249 x 1 + 17
We consider the new divisor 249 and the new remainder 17,and apply the division lemma to get
249 = 17 x 14 + 11
We consider the new divisor 17 and the new remainder 11,and apply the division lemma to get
17 = 11 x 1 + 6
We consider the new divisor 11 and the new remainder 6,and apply the division lemma to get
11 = 6 x 1 + 5
We consider the new divisor 6 and the new remainder 5,and apply the division lemma to get
6 = 5 x 1 + 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 781 and 515 is 1
Notice that 1 = HCF(5,1) = HCF(6,5) = HCF(11,6) = HCF(17,11) = HCF(249,17) = HCF(266,249) = HCF(515,266) = HCF(781,515) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 79 > 1, we apply the division lemma to 79 and 1, to get
79 = 1 x 79 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 1 and 79 is 1
Notice that 1 = HCF(79,1) .
Here are some samples of HCF using Euclid's Algorithm calculations.
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 781, 515, 79?
Answer: HCF of 781, 515, 79 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 781, 515, 79 using Euclid's Algorithm?
Answer: For arbitrary numbers 781, 515, 79 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.