Highest Common Factor of 651, 870, 21 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 651, 870, 21 i.e. 3 the largest integer that leaves a remainder zero for all numbers.
HCF of 651, 870, 21 is 3 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 651, 870, 21 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 651, 870, 21 is 3.
HCF(651, 870, 21) = 3
HCF of 651, 870, 21 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 651, 870, 21 is 3.
Highest Common Factor of 651,870,21 is 3
Step 1: Since 870 > 651, we apply the division lemma to 870 and 651, to get
870 = 651 x 1 + 219
Step 2: Since the reminder 651 ≠ 0, we apply division lemma to 219 and 651, to get
651 = 219 x 2 + 213
Step 3: We consider the new divisor 219 and the new remainder 213, and apply the division lemma to get
219 = 213 x 1 + 6
We consider the new divisor 213 and the new remainder 6,and apply the division lemma to get
213 = 6 x 35 + 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 651 and 870 is 3
Notice that 3 = HCF(6,3) = HCF(213,6) = HCF(219,213) = HCF(651,219) = HCF(870,651) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 21 > 3, we apply the division lemma to 21 and 3, to get
21 = 3 x 7 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 3, the HCF of 3 and 21 is 3
Notice that 3 = HCF(21,3) .
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Frequently Asked Questions on HCF of 651, 870, 21 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 651, 870, 21?
Answer: HCF of 651, 870, 21 is 3 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 651, 870, 21 using Euclid's Algorithm?
Answer: For arbitrary numbers 651, 870, 21 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.