Highest Common Factor of 81, 690, 561 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 81, 690, 561 i.e. 3 the largest integer that leaves a remainder zero for all numbers.
HCF of 81, 690, 561 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 81, 690, 561 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 81, 690, 561 is 3.
HCF(81, 690, 561) = 3
HCF of 81, 690, 561 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 81, 690, 561 is 3.
Highest Common Factor of 81,690,561 is 3
Step 1: Since 690 > 81, we apply the division lemma to 690 and 81, to get
690 = 81 x 8 + 42
Step 2: Since the reminder 81 ≠ 0, we apply division lemma to 42 and 81, to get
81 = 42 x 1 + 39
Step 3: We consider the new divisor 42 and the new remainder 39, and apply the division lemma to get
42 = 39 x 1 + 3
We consider the new divisor 39 and the new remainder 3, and apply the division lemma to get
39 = 3 x 13 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 3, the HCF of 81 and 690 is 3
Notice that 3 = HCF(39,3) = HCF(42,39) = HCF(81,42) = HCF(690,81) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 561 > 3, we apply the division lemma to 561 and 3, to get
561 = 3 x 187 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 3, the HCF of 3 and 561 is 3
Notice that 3 = HCF(561,3) .
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Frequently Asked Questions on HCF of 81, 690, 561 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 81, 690, 561?
Answer: HCF of 81, 690, 561 is 3 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 81, 690, 561 using Euclid's Algorithm?
Answer: For arbitrary numbers 81, 690, 561 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.