Highest Common Factor of 640, 780, 245 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 640, 780, 245 i.e. 5 the largest integer that leaves a remainder zero for all numbers.
HCF of 640, 780, 245 is 5 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 640, 780, 245 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 640, 780, 245 is 5.
HCF(640, 780, 245) = 5
HCF of 640, 780, 245 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 640, 780, 245 is 5.
Highest Common Factor of 640,780,245 is 5
Step 1: Since 780 > 640, we apply the division lemma to 780 and 640, to get
780 = 640 x 1 + 140
Step 2: Since the reminder 640 ≠ 0, we apply division lemma to 140 and 640, to get
640 = 140 x 4 + 80
Step 3: We consider the new divisor 140 and the new remainder 80, and apply the division lemma to get
140 = 80 x 1 + 60
We consider the new divisor 80 and the new remainder 60,and apply the division lemma to get
80 = 60 x 1 + 20
We consider the new divisor 60 and the new remainder 20,and apply the division lemma to get
60 = 20 x 3 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 20, the HCF of 640 and 780 is 20
Notice that 20 = HCF(60,20) = HCF(80,60) = HCF(140,80) = HCF(640,140) = HCF(780,640) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 245 > 20, we apply the division lemma to 245 and 20, to get
245 = 20 x 12 + 5
Step 2: Since the reminder 20 ≠ 0, we apply division lemma to 5 and 20, to get
20 = 5 x 4 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 5, the HCF of 20 and 245 is 5
Notice that 5 = HCF(20,5) = HCF(245,20) .
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Frequently Asked Questions on HCF of 640, 780, 245 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 640, 780, 245?
Answer: HCF of 640, 780, 245 is 5 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 640, 780, 245 using Euclid's Algorithm?
Answer: For arbitrary numbers 640, 780, 245 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.