Highest Common Factor of 861, 978, 13, 980 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 861, 978, 13, 980 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 861, 978, 13, 980 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 861, 978, 13, 980 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 861, 978, 13, 980 is 1.
HCF(861, 978, 13, 980) = 1
HCF of 861, 978, 13, 980 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 861, 978, 13, 980 is 1.
Highest Common Factor of 861,978,13,980 is 1
Step 1: Since 978 > 861, we apply the division lemma to 978 and 861, to get
978 = 861 x 1 + 117
Step 2: Since the reminder 861 ≠ 0, we apply division lemma to 117 and 861, to get
861 = 117 x 7 + 42
Step 3: We consider the new divisor 117 and the new remainder 42, and apply the division lemma to get
117 = 42 x 2 + 33
We consider the new divisor 42 and the new remainder 33,and apply the division lemma to get
42 = 33 x 1 + 9
We consider the new divisor 33 and the new remainder 9,and apply the division lemma to get
33 = 9 x 3 + 6
We consider the new divisor 9 and the new remainder 6,and apply the division lemma to get
9 = 6 x 1 + 3
We consider the new divisor 6 and the new remainder 3,and apply the division lemma to get
6 = 3 x 2 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 3, the HCF of 861 and 978 is 3
Notice that 3 = HCF(6,3) = HCF(9,6) = HCF(33,9) = HCF(42,33) = HCF(117,42) = HCF(861,117) = HCF(978,861) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 13 > 3, we apply the division lemma to 13 and 3, to get
13 = 3 x 4 + 1
Step 2: Since the reminder 3 ≠ 0, we apply division lemma to 1 and 3, 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 3 and 13 is 1
Notice that 1 = HCF(3,1) = HCF(13,3) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 980 > 1, we apply the division lemma to 980 and 1, to get
980 = 1 x 980 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 1 and 980 is 1
Notice that 1 = HCF(980,1) .
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Frequently Asked Questions on HCF of 861, 978, 13, 980 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 861, 978, 13, 980?
Answer: HCF of 861, 978, 13, 980 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 861, 978, 13, 980 using Euclid's Algorithm?
Answer: For arbitrary numbers 861, 978, 13, 980 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.