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, 778 i.e. 2 the largest integer that leaves a remainder zero for all numbers.
HCF of 638, 778 is 2 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, 778 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, 778 is 2.
HCF(638, 778) = 2
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 638, 778 is 2.
Step 1: Since 778 > 638, we apply the division lemma to 778 and 638, to get
778 = 638 x 1 + 140
Step 2: Since the reminder 638 ≠ 0, we apply division lemma to 140 and 638, to get
638 = 140 x 4 + 78
Step 3: We consider the new divisor 140 and the new remainder 78, and apply the division lemma to get
140 = 78 x 1 + 62
We consider the new divisor 78 and the new remainder 62,and apply the division lemma to get
78 = 62 x 1 + 16
We consider the new divisor 62 and the new remainder 16,and apply the division lemma to get
62 = 16 x 3 + 14
We consider the new divisor 16 and the new remainder 14,and apply the division lemma to get
16 = 14 x 1 + 2
We consider the new divisor 14 and the new remainder 2,and apply the division lemma to get
14 = 2 x 7 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 2, the HCF of 638 and 778 is 2
Notice that 2 = HCF(14,2) = HCF(16,14) = HCF(62,16) = HCF(78,62) = HCF(140,78) = HCF(638,140) = HCF(778,638) .
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, 778?
Answer: HCF of 638, 778 is 2 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 638, 778 using Euclid's Algorithm?
Answer: For arbitrary numbers 638, 778 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.