# Highest Common Factor of 45, 75, 90, 123 using Euclid's algorithm

HCF Calculator using the Euclid Division Algorithm helps you to find the Highest common factor (HCF) easily for 45, 75, 90, 123 i.e. 3 the largest integer that leaves a remainder zero for all numbers.

HCF of 45, 75, 90, 123 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 45, 75, 90, 123 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 45, 75, 90, 123 is 3.

HCF(45, 75, 90, 123) = 3

## HCF of 45, 75, 90, 123 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 45, 75, 90, 123 is 3.

### Highest Common Factor of 45,75,90,123 using Euclid's algorithm

Step 1: Since 75 > 45, we apply the division lemma to 75 and 45, to get

75 = 45 x 1 + 30

Step 2: Since the reminder 45 ≠ 0, we apply division lemma to 30 and 45, to get

45 = 30 x 1 + 15

Step 3: We consider the new divisor 30 and the new remainder 15, and apply the division lemma to get

30 = 15 x 2 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 15, the HCF of 45 and 75 is 15

Notice that 15 = HCF(30,15) = HCF(45,30) = HCF(75,45) .

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

Step 1: Since 90 > 15, we apply the division lemma to 90 and 15, to get

90 = 15 x 6 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 15, the HCF of 15 and 90 is 15

Notice that 15 = HCF(90,15) .

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

Step 1: Since 123 > 15, we apply the division lemma to 123 and 15, to get

123 = 15 x 8 + 3

Step 2: Since the reminder 15 ≠ 0, we apply division lemma to 3 and 15, to get

15 = 3 x 5 + 0

The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 3, the HCF of 15 and 123 is 3

Notice that 3 = HCF(15,3) = HCF(123,15) .

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### Frequently Asked Questions on HCF of 45, 75, 90, 123 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 45, 75, 90, 123?

Answer: HCF of 45, 75, 90, 123 is 3 the largest number that divides all the numbers leaving a remainder zero.

3. How to find HCF of 45, 75, 90, 123 using Euclid's Algorithm?

Answer: For arbitrary numbers 45, 75, 90, 123 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.