Highest Common Factor of 42, 72, 24, 40 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 42, 72, 24, 40 i.e. 2 the largest integer that leaves a remainder zero for all numbers.
HCF of 42, 72, 24, 40 is 2 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 42, 72, 24, 40 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 42, 72, 24, 40 is 2.
HCF(42, 72, 24, 40) = 2
HCF of 42, 72, 24, 40 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 42, 72, 24, 40 is 2.
Highest Common Factor of 42,72,24,40 is 2
Step 1: Since 72 > 42, we apply the division lemma to 72 and 42, to get
72 = 42 x 1 + 30
Step 2: Since the reminder 42 ≠ 0, we apply division lemma to 30 and 42, to get
42 = 30 x 1 + 12
Step 3: We consider the new divisor 30 and the new remainder 12, and apply the division lemma to get
30 = 12 x 2 + 6
We consider the new divisor 12 and the new remainder 6, and apply the division lemma to get
12 = 6 x 2 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 6, the HCF of 42 and 72 is 6
Notice that 6 = HCF(12,6) = HCF(30,12) = HCF(42,30) = HCF(72,42) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 24 > 6, we apply the division lemma to 24 and 6, to get
24 = 6 x 4 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 6, the HCF of 6 and 24 is 6
Notice that 6 = HCF(24,6) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 40 > 6, we apply the division lemma to 40 and 6, to get
40 = 6 x 6 + 4
Step 2: Since the reminder 6 ≠ 0, we apply division lemma to 4 and 6, to get
6 = 4 x 1 + 2
Step 3: We consider the new divisor 4 and the new remainder 2, and apply the division lemma to get
4 = 2 x 2 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 2, the HCF of 6 and 40 is 2
Notice that 2 = HCF(4,2) = HCF(6,4) = HCF(40,6) .
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Frequently Asked Questions on HCF of 42, 72, 24, 40 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 42, 72, 24, 40?
Answer: HCF of 42, 72, 24, 40 is 2 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 42, 72, 24, 40 using Euclid's Algorithm?
Answer: For arbitrary numbers 42, 72, 24, 40 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.