Highest Common Factor of 665, 1555 using Euclid's algorithm
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 665, 1555 i.e. 5 the largest integer that leaves a remainder zero for all numbers.
HCF of 665, 1555 is 5 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 665, 1555 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 665, 1555 is 5.
HCF(665, 1555) = 5
HCF of 665, 1555 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 665, 1555 is 5.
Highest Common Factor of 665,1555 is 5
Step 1: Since 1555 > 665, we apply the division lemma to 1555 and 665, to get
1555 = 665 x 2 + 225
Step 2: Since the reminder 665 ≠ 0, we apply division lemma to 225 and 665, to get
665 = 225 x 2 + 215
Step 3: We consider the new divisor 225 and the new remainder 215, and apply the division lemma to get
225 = 215 x 1 + 10
We consider the new divisor 215 and the new remainder 10,and apply the division lemma to get
215 = 10 x 21 + 5
We consider the new divisor 10 and the new remainder 5,and apply the division lemma to get
10 = 5 x 2 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 5, the HCF of 665 and 1555 is 5
Notice that 5 = HCF(10,5) = HCF(215,10) = HCF(225,215) = HCF(665,225) = HCF(1555,665) .
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Frequently Asked Questions on HCF of 665, 1555 using Euclid's Algorithm
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 665, 1555?
Answer: HCF of 665, 1555 is 5 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 665, 1555 using Euclid's Algorithm?
Answer: For arbitrary numbers 665, 1555 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.