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 393, 381, 647 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 393, 381, 647 is 1 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 393, 381, 647 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 393, 381, 647 is 1.
HCF(393, 381, 647) = 1
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 393, 381, 647 is 1.
Step 1: Since 393 > 381, we apply the division lemma to 393 and 381, to get
393 = 381 x 1 + 12
Step 2: Since the reminder 381 ≠ 0, we apply division lemma to 12 and 381, to get
381 = 12 x 31 + 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 393 and 381 is 3
Notice that 3 = HCF(9,3) = HCF(12,9) = HCF(381,12) = HCF(393,381) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 647 > 3, we apply the division lemma to 647 and 3, to get
647 = 3 x 215 + 2
Step 2: Since the reminder 3 ≠ 0, we apply division lemma to 2 and 3, to get
3 = 2 x 1 + 1
Step 3: We consider the new divisor 2 and the new remainder 1, and apply the division lemma to get
2 = 1 x 2 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 3 and 647 is 1
Notice that 1 = HCF(2,1) = HCF(3,2) = HCF(647,3) .
Here are some samples of HCF using Euclid's Algorithm calculations.
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 393, 381, 647?
Answer: HCF of 393, 381, 647 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 393, 381, 647 using Euclid's Algorithm?
Answer: For arbitrary numbers 393, 381, 647 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.