Highest Common Factor of 69, 42, 12 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, 42, 12 i.e. 3 the largest integer that leaves a remainder zero for all numbers.
HCF of 69, 42, 12 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, 42, 12 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, 42, 12 is 3.
HCF(69, 42, 12) = 3
HCF of 69, 42, 12 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, 42, 12 is 3.
Highest Common Factor of 69,42,12 is 3
Step 1: Since 69 > 42, we apply the division lemma to 69 and 42, to get
69 = 42 x 1 + 27
Step 2: Since the reminder 42 ≠ 0, we apply division lemma to 27 and 42, to get
42 = 27 x 1 + 15
Step 3: We consider the new divisor 27 and the new remainder 15, and apply the division lemma to get
27 = 15 x 1 + 12
We consider the new divisor 15 and the new remainder 12,and apply the division lemma to get
15 = 12 x 1 + 3
We consider the new divisor 12 and the new remainder 3,and apply the division lemma to get
12 = 3 x 4 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 3, the HCF of 69 and 42 is 3
Notice that 3 = HCF(12,3) = HCF(15,12) = HCF(27,15) = HCF(42,27) = HCF(69,42) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 12 > 3, we apply the division lemma to 12 and 3, to get
12 = 3 x 4 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 3, the HCF of 3 and 12 is 3
Notice that 3 = HCF(12,3) .
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Frequently Asked Questions on HCF of 69, 42, 12 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, 42, 12?
Answer: HCF of 69, 42, 12 is 3 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 69, 42, 12 using Euclid's Algorithm?
Answer: For arbitrary numbers 69, 42, 12 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.