Highest Common Factor of 69, 81 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 69, 81 i.e. 3 the largest integer that leaves a remainder zero for all numbers.
HCF of 69, 81 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 69, 81 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 69, 81 is 3.
HCF(69, 81) = 3
HCF of 69, 81 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 69, 81 is 3.
Highest Common Factor of 69,81 is 3
Step 1: Since 81 > 69, we apply the division lemma to 81 and 69, to get
81 = 69 x 1 + 12
Step 2: Since the reminder 69 ≠ 0, we apply division lemma to 12 and 69, to get
69 = 12 x 5 + 9
Step 3: We consider the new divisor 12 and the new remainder 9, and apply the division lemma to get
12 = 9 x 1 + 3
We consider the new divisor 9 and the new remainder 3, and apply the division lemma to get
9 = 3 x 3 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 3, the HCF of 69 and 81 is 3
Notice that 3 = HCF(9,3) = HCF(12,9) = HCF(69,12) = HCF(81,69) .
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Frequently Asked Questions on HCF of 69, 81 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 69, 81?
Answer: HCF of 69, 81 is 3 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 69, 81 using Euclid's Algorithm?
Answer: For arbitrary numbers 69, 81 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.