HCF Calculator using the Euclid Division Algorithm helps you to find the Highest common factor (HCF) easily for 21, 35, 49 i.e. 7 the largest integer that leaves a remainder zero for all numbers.

HCF of 21, 35, 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 21, 35, 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 21, 35, 49 is **7**.

HCF(21, 35, 49) = 7

*Highest common factor* or Highest common divisor (hcd) can be calculated by Euclid's algotithm.

Highest common factor (HCF) of 21, 35, 49 is **7**.

**Step 1:** Since 35 > 21, we apply the division lemma to 35 and 21, to get

35 = 21 x 1 + 14

**Step 2:** Since the reminder 21 ≠ 0, we apply division lemma to 14 and 21, to get

21 = 14 x 1 + 7

**Step 3:** We consider the new divisor 14 and the new remainder 7, and apply the division lemma 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 21 and 35 is 7

Notice that 7 = HCF(14,7) = HCF(21,14) = HCF(35,21) .

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

**Step 1:** Since 49 > 7, we apply the division lemma to 49 and 7, to get

49 = 7 x 7 + 0

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

Notice that 7 = HCF(49,7) .

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 21, 35, 49?

Answer: HCF of 21, 35, 49 is 7 the largest number that divides all the numbers leaving a remainder zero.

3. How to find HCF of 21, 35, 49 using Euclid's Algorithm?

Answer: For arbitrary numbers 21, 35, 49 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.