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 638, 243, 542 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 638, 243, 542 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 638, 243, 542 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 638, 243, 542 is 1.
HCF(638, 243, 542) = 1
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 638, 243, 542 is 1.
Step 1: Since 638 > 243, we apply the division lemma to 638 and 243, to get
638 = 243 x 2 + 152
Step 2: Since the reminder 243 ≠ 0, we apply division lemma to 152 and 243, to get
243 = 152 x 1 + 91
Step 3: We consider the new divisor 152 and the new remainder 91, and apply the division lemma to get
152 = 91 x 1 + 61
We consider the new divisor 91 and the new remainder 61,and apply the division lemma to get
91 = 61 x 1 + 30
We consider the new divisor 61 and the new remainder 30,and apply the division lemma to get
61 = 30 x 2 + 1
We consider the new divisor 30 and the new remainder 1,and apply the division lemma to get
30 = 1 x 30 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 638 and 243 is 1
Notice that 1 = HCF(30,1) = HCF(61,30) = HCF(91,61) = HCF(152,91) = HCF(243,152) = HCF(638,243) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 542 > 1, we apply the division lemma to 542 and 1, to get
542 = 1 x 542 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 1 and 542 is 1
Notice that 1 = HCF(542,1) .
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 638, 243, 542?
Answer: HCF of 638, 243, 542 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 638, 243, 542 using Euclid's Algorithm?
Answer: For arbitrary numbers 638, 243, 542 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.