# Highest Common Factor of 30, 78, 69, 12 using Euclid's algorithm

HCF Calculator using the Euclid Division Algorithm helps you to find the Highest common factor (HCF) easily for 30, 78, 69, 12 i.e. 3 the largest integer that leaves a remainder zero for all numbers.

HCF of 30, 78, 69, 12 is 3 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 30, 78, 69, 12 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 30, 78, 69, 12 is 3.

HCF(30, 78, 69, 12) = 3

## HCF of 30, 78, 69, 12 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 30, 78, 69, 12 is 3.

### Highest Common Factor of 30,78,69,12 using Euclid's algorithm

Step 1: Since 78 > 30, we apply the division lemma to 78 and 30, to get

78 = 30 x 2 + 18

Step 2: Since the reminder 30 ≠ 0, we apply division lemma to 18 and 30, to get

30 = 18 x 1 + 12

Step 3: We consider the new divisor 18 and the new remainder 12, and apply the division lemma to get

18 = 12 x 1 + 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 30 and 78 is 6

Notice that 6 = HCF(12,6) = HCF(18,12) = HCF(30,18) = HCF(78,30) .

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

Step 1: Since 69 > 6, we apply the division lemma to 69 and 6, to get

69 = 6 x 11 + 3

Step 2: Since the reminder 6 ≠ 0, we apply division lemma to 3 and 6, to get

6 = 3 x 2 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 3, the HCF of 6 and 69 is 3

Notice that 3 = HCF(6,3) = HCF(69,6) .

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

Step 1: Since 12 > 3, we apply the division lemma to 12 and 3, to get

12 = 3 x 4 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 3, the HCF of 3 and 12 is 3

Notice that 3 = HCF(12,3) .

### HCF using Euclid's Algorithm Calculation Examples

Here are some samples of HCF using Euclid's Algorithm calculations.

### Frequently Asked Questions on HCF of 30, 78, 69, 12 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 30, 78, 69, 12?

Answer: HCF of 30, 78, 69, 12 is 3 the largest number that divides all the numbers leaving a remainder zero.

3. How to find HCF of 30, 78, 69, 12 using Euclid's Algorithm?

Answer: For arbitrary numbers 30, 78, 69, 12 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.