Highest Common Factor of 98, 28, 78, 20 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 98, 28, 78, 20 i.e. 2 the largest integer that leaves a remainder zero for all numbers.
HCF of 98, 28, 78, 20 is 2 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 98, 28, 78, 20 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 98, 28, 78, 20 is 2.
HCF(98, 28, 78, 20) = 2
HCF of 98, 28, 78, 20 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 98, 28, 78, 20 is 2.
Highest Common Factor of 98,28,78,20 is 2
Step 1: Since 98 > 28, we apply the division lemma to 98 and 28, to get
98 = 28 x 3 + 14
Step 2: Since the reminder 28 ≠ 0, we apply division lemma to 14 and 28, to get
28 = 14 x 2 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 14, the HCF of 98 and 28 is 14
Notice that 14 = HCF(28,14) = HCF(98,28) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 78 > 14, we apply the division lemma to 78 and 14, to get
78 = 14 x 5 + 8
Step 2: Since the reminder 14 ≠ 0, we apply division lemma to 8 and 14, to get
14 = 8 x 1 + 6
Step 3: We consider the new divisor 8 and the new remainder 6, and apply the division lemma to get
8 = 6 x 1 + 2
We consider the new divisor 6 and the new remainder 2, and apply the division lemma to get
6 = 2 x 3 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 2, the HCF of 14 and 78 is 2
Notice that 2 = HCF(6,2) = HCF(8,6) = HCF(14,8) = HCF(78,14) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 20 > 2, we apply the division lemma to 20 and 2, to get
20 = 2 x 10 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 2, the HCF of 2 and 20 is 2
Notice that 2 = HCF(20,2) .
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Frequently Asked Questions on HCF of 98, 28, 78, 20 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 98, 28, 78, 20?
Answer: HCF of 98, 28, 78, 20 is 2 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 98, 28, 78, 20 using Euclid's Algorithm?
Answer: For arbitrary numbers 98, 28, 78, 20 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.