Highest Common Factor of 621, 409, 990 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 621, 409, 990 i.e. 1 the largest integer that leaves a remainder zero for all numbers.

HCF of 621, 409, 990 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 621, 409, 990 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 621, 409, 990 is 1.

HCF(621, 409, 990) = 1

HCF of 621, 409, 990 using Euclid's algorithm

Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.

HCF of:

Highest common factor (HCF) of 621, 409, 990 is 1.

Highest Common Factor of 621,409,990 using Euclid's algorithm

Highest Common Factor of 621,409,990 is 1

Step 1: Since 621 > 409, we apply the division lemma to 621 and 409, to get

621 = 409 x 1 + 212

Step 2: Since the reminder 409 ≠ 0, we apply division lemma to 212 and 409, to get

409 = 212 x 1 + 197

Step 3: We consider the new divisor 212 and the new remainder 197, and apply the division lemma to get

212 = 197 x 1 + 15

We consider the new divisor 197 and the new remainder 15,and apply the division lemma to get

197 = 15 x 13 + 2

We consider the new divisor 15 and the new remainder 2,and apply the division lemma to get

15 = 2 x 7 + 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 621 and 409 is 1

Notice that 1 = HCF(2,1) = HCF(15,2) = HCF(197,15) = HCF(212,197) = HCF(409,212) = HCF(621,409) .

We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma

Step 1: Since 990 > 1, we apply the division lemma to 990 and 1, to get

990 = 1 x 990 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 1 and 990 is 1

Notice that 1 = HCF(990,1) .

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Frequently Asked Questions on HCF of 621, 409, 990 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 621, 409, 990?

Answer: HCF of 621, 409, 990 is 1 the largest number that divides all the numbers leaving a remainder zero.

3. How to find HCF of 621, 409, 990 using Euclid's Algorithm?

Answer: For arbitrary numbers 621, 409, 990 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.