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 69, 45, 42, 620 i.e. 1 the largest integer that leaves a remainder zero for all numbers.
HCF of 69, 45, 42, 620 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 69, 45, 42, 620 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 69, 45, 42, 620 is 1.
HCF(69, 45, 42, 620) = 1
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 69, 45, 42, 620 is 1.
Step 1: Since 69 > 45, we apply the division lemma to 69 and 45, to get
69 = 45 x 1 + 24
Step 2: Since the reminder 45 ≠ 0, we apply division lemma to 24 and 45, to get
45 = 24 x 1 + 21
Step 3: We consider the new divisor 24 and the new remainder 21, and apply the division lemma to get
24 = 21 x 1 + 3
We consider the new divisor 21 and the new remainder 3, and apply the division lemma to get
21 = 3 x 7 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 3, the HCF of 69 and 45 is 3
Notice that 3 = HCF(21,3) = HCF(24,21) = HCF(45,24) = HCF(69,45) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 42 > 3, we apply the division lemma to 42 and 3, to get
42 = 3 x 14 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 3, the HCF of 3 and 42 is 3
Notice that 3 = HCF(42,3) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 620 > 3, we apply the division lemma to 620 and 3, to get
620 = 3 x 206 + 2
Step 2: Since the reminder 3 ≠ 0, we apply division lemma to 2 and 3, to get
3 = 2 x 1 + 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 3 and 620 is 1
Notice that 1 = HCF(2,1) = HCF(3,2) = HCF(620,3) .
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 69, 45, 42, 620?
Answer: HCF of 69, 45, 42, 620 is 1 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 69, 45, 42, 620 using Euclid's Algorithm?
Answer: For arbitrary numbers 69, 45, 42, 620 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.