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, 679, 138 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 243, 679, 138 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 243, 679, 138 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, 679, 138 is 1.
HCF(243, 679, 138) = 1
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 243, 679, 138 is 1.
Step 1: Since 679 > 243, we apply the division lemma to 679 and 243, to get
679 = 243 x 2 + 193
Step 2: Since the reminder 243 ≠ 0, we apply division lemma to 193 and 243, to get
243 = 193 x 1 + 50
Step 3: We consider the new divisor 193 and the new remainder 50, and apply the division lemma to get
193 = 50 x 3 + 43
We consider the new divisor 50 and the new remainder 43,and apply the division lemma to get
50 = 43 x 1 + 7
We consider the new divisor 43 and the new remainder 7,and apply the division lemma to get
43 = 7 x 6 + 1
We consider the new divisor 7 and the new remainder 1,and apply the division lemma to get
7 = 1 x 7 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 243 and 679 is 1
Notice that 1 = HCF(7,1) = HCF(43,7) = HCF(50,43) = HCF(193,50) = HCF(243,193) = HCF(679,243) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 138 > 1, we apply the division lemma to 138 and 1, to get
138 = 1 x 138 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 1 and 138 is 1
Notice that 1 = HCF(138,1) .
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 243, 679, 138?
Answer: HCF of 243, 679, 138 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 243, 679, 138 using Euclid's Algorithm?
Answer: For arbitrary numbers 243, 679, 138 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.