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 405, 949, 128 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 405, 949, 128 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 405, 949, 128 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 405, 949, 128 is 1.
HCF(405, 949, 128) = 1
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 405, 949, 128 is 1.
Step 1: Since 949 > 405, we apply the division lemma to 949 and 405, to get
949 = 405 x 2 + 139
Step 2: Since the reminder 405 ≠ 0, we apply division lemma to 139 and 405, to get
405 = 139 x 2 + 127
Step 3: We consider the new divisor 139 and the new remainder 127, and apply the division lemma to get
139 = 127 x 1 + 12
We consider the new divisor 127 and the new remainder 12,and apply the division lemma to get
127 = 12 x 10 + 7
We consider the new divisor 12 and the new remainder 7,and apply the division lemma to get
12 = 7 x 1 + 5
We consider the new divisor 7 and the new remainder 5,and apply the division lemma to get
7 = 5 x 1 + 2
We consider the new divisor 5 and the new remainder 2,and apply the division lemma to get
5 = 2 x 2 + 1
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 405 and 949 is 1
Notice that 1 = HCF(2,1) = HCF(5,2) = HCF(7,5) = HCF(12,7) = HCF(127,12) = HCF(139,127) = HCF(405,139) = HCF(949,405) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 128 > 1, we apply the division lemma to 128 and 1, to get
128 = 1 x 128 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 1 and 128 is 1
Notice that 1 = HCF(128,1) .
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 405, 949, 128?
Answer: HCF of 405, 949, 128 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 405, 949, 128 using Euclid's Algorithm?
Answer: For arbitrary numbers 405, 949, 128 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.