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Highest Common Factor of 28, 42, 49 using Euclid's algorithm

HCF Calculator using the Euclid Division Algorithm helps you to find the Highest common factor (HCF) easily for 28, 42, 49 i.e. 7 the largest integer that leaves a remainder zero for all numbers.

HCF of 28, 42, 49 is 7 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 28, 42, 49 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 28, 42, 49 is 7.

HCF(28, 42, 49) = 7

HCF of 28, 42, 49 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 28, 42, 49 is 7.

Highest Common Factor of 28,42,49 using Euclid's algorithm

Step 1: Since 42 > 28, we apply the division lemma to 42 and 28, to get

42 = 28 x 1 + 14

Step 2: Since the reminder 28 ≠ 0, we apply division lemma to 14 and 28, to get

28 = 14 x 2 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 14, the HCF of 28 and 42 is 14

Notice that 14 = HCF(28,14) = HCF(42,28) .


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

Step 1: Since 49 > 14, we apply the division lemma to 49 and 14, to get

49 = 14 x 3 + 7

Step 2: Since the reminder 14 ≠ 0, we apply division lemma to 7 and 14, to get

14 = 7 x 2 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 7, the HCF of 14 and 49 is 7

Notice that 7 = HCF(14,7) = HCF(49,14) .

Frequently Asked Questions on HCF of 28, 42, 49 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 28, 42, 49?

Answer: HCF of 28, 42, 49 is 7 the largest number that divides all the numbers leaving a remainder zero.

3. How to find HCF of 28, 42, 49 using Euclid's Algorithm?

Answer: For arbitrary numbers 28, 42, 49 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.