Highest Common Factor of 12, 28, 21, 451 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 12, 28, 21, 451 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 12, 28, 21, 451 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 12, 28, 21, 451 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 12, 28, 21, 451 is 1.
HCF(12, 28, 21, 451) = 1
HCF of 12, 28, 21, 451 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 12, 28, 21, 451 is 1.
Highest Common Factor of 12,28,21,451 is 1
Step 1: Since 28 > 12, we apply the division lemma to 28 and 12, to get
28 = 12 x 2 + 4
Step 2: Since the reminder 12 ≠ 0, we apply division lemma to 4 and 12, to get
12 = 4 x 3 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 4, the HCF of 12 and 28 is 4
Notice that 4 = HCF(12,4) = HCF(28,12) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 21 > 4, we apply the division lemma to 21 and 4, to get
21 = 4 x 5 + 1
Step 2: Since the reminder 4 ≠ 0, we apply division lemma to 1 and 4, to get
4 = 1 x 4 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 4 and 21 is 1
Notice that 1 = HCF(4,1) = HCF(21,4) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 451 > 1, we apply the division lemma to 451 and 1, to get
451 = 1 x 451 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 1 and 451 is 1
Notice that 1 = HCF(451,1) .
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Frequently Asked Questions on HCF of 12, 28, 21, 451 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 12, 28, 21, 451?
Answer: HCF of 12, 28, 21, 451 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 12, 28, 21, 451 using Euclid's Algorithm?
Answer: For arbitrary numbers 12, 28, 21, 451 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.