Highest Common Factor of 399, 494, 21 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 399, 494, 21 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 399, 494, 21 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 399, 494, 21 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 399, 494, 21 is 1.
HCF(399, 494, 21) = 1
HCF of 399, 494, 21 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 399, 494, 21 is 1.
Highest Common Factor of 399,494,21 is 1
Step 1: Since 494 > 399, we apply the division lemma to 494 and 399, to get
494 = 399 x 1 + 95
Step 2: Since the reminder 399 ≠ 0, we apply division lemma to 95 and 399, to get
399 = 95 x 4 + 19
Step 3: We consider the new divisor 95 and the new remainder 19, and apply the division lemma to get
95 = 19 x 5 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 19, the HCF of 399 and 494 is 19
Notice that 19 = HCF(95,19) = HCF(399,95) = HCF(494,399) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 21 > 19, we apply the division lemma to 21 and 19, to get
21 = 19 x 1 + 2
Step 2: Since the reminder 19 ≠ 0, we apply division lemma to 2 and 19, to get
19 = 2 x 9 + 1
Step 3: 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 19 and 21 is 1
Notice that 1 = HCF(2,1) = HCF(19,2) = HCF(21,19) .
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Frequently Asked Questions on HCF of 399, 494, 21 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 399, 494, 21?
Answer: HCF of 399, 494, 21 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 399, 494, 21 using Euclid's Algorithm?
Answer: For arbitrary numbers 399, 494, 21 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.
