Highest Common Factor of 243, 399, 18 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 243, 399, 18 i.e. 3 the largest integer that leaves a remainder zero for all numbers.
HCF of 243, 399, 18 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 243, 399, 18 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 243, 399, 18 is 3.
HCF(243, 399, 18) = 3
HCF of 243, 399, 18 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 243, 399, 18 is 3.
Highest Common Factor of 243,399,18 is 3
Step 1: Since 399 > 243, we apply the division lemma to 399 and 243, to get
399 = 243 x 1 + 156
Step 2: Since the reminder 243 ≠ 0, we apply division lemma to 156 and 243, to get
243 = 156 x 1 + 87
Step 3: We consider the new divisor 156 and the new remainder 87, and apply the division lemma to get
156 = 87 x 1 + 69
We consider the new divisor 87 and the new remainder 69,and apply the division lemma to get
87 = 69 x 1 + 18
We consider the new divisor 69 and the new remainder 18,and apply the division lemma to get
69 = 18 x 3 + 15
We consider the new divisor 18 and the new remainder 15,and apply the division lemma to get
18 = 15 x 1 + 3
We consider the new divisor 15 and the new remainder 3,and apply the division lemma to get
15 = 3 x 5 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 3, the HCF of 243 and 399 is 3
Notice that 3 = HCF(15,3) = HCF(18,15) = HCF(69,18) = HCF(87,69) = HCF(156,87) = HCF(243,156) = HCF(399,243) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 18 > 3, we apply the division lemma to 18 and 3, to get
18 = 3 x 6 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 3, the HCF of 3 and 18 is 3
Notice that 3 = HCF(18,3) .
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Frequently Asked Questions on HCF of 243, 399, 18 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 243, 399, 18?
Answer: HCF of 243, 399, 18 is 3 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 243, 399, 18 using Euclid's Algorithm?
Answer: For arbitrary numbers 243, 399, 18 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.