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 81, 99, 79, 845 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 81, 99, 79, 845 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 81, 99, 79, 845 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 81, 99, 79, 845 is 1.
HCF(81, 99, 79, 845) = 1
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 81, 99, 79, 845 is 1.
Step 1: Since 99 > 81, we apply the division lemma to 99 and 81, to get
99 = 81 x 1 + 18
Step 2: Since the reminder 81 ≠ 0, we apply division lemma to 18 and 81, to get
81 = 18 x 4 + 9
Step 3: We consider the new divisor 18 and the new remainder 9, and apply the division lemma to get
18 = 9 x 2 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 9, the HCF of 81 and 99 is 9
Notice that 9 = HCF(18,9) = HCF(81,18) = HCF(99,81) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 79 > 9, we apply the division lemma to 79 and 9, to get
79 = 9 x 8 + 7
Step 2: Since the reminder 9 ≠ 0, we apply division lemma to 7 and 9, to get
9 = 7 x 1 + 2
Step 3: We consider the new divisor 7 and the new remainder 2, and apply the division lemma to get
7 = 2 x 3 + 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 9 and 79 is 1
Notice that 1 = HCF(2,1) = HCF(7,2) = HCF(9,7) = HCF(79,9) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 845 > 1, we apply the division lemma to 845 and 1, to get
845 = 1 x 845 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 1, the HCF of 1 and 845 is 1
Notice that 1 = HCF(845,1) .
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 81, 99, 79, 845?
Answer: HCF of 81, 99, 79, 845 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 81, 99, 79, 845 using Euclid's Algorithm?
Answer: For arbitrary numbers 81, 99, 79, 845 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.