# Highest Common Factor of 777, 455 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 777, 455 i.e. 7 the largest integer that leaves a remainder zero for all numbers.

HCF of 777, 455 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 777, 455 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 777, 455 is 7.

HCF(777, 455) = 7

## HCF of 777, 455 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 777, 455 is 7. ### Highest Common Factor of 777,455 is 7

Step 1: Since 777 > 455, we apply the division lemma to 777 and 455, to get

777 = 455 x 1 + 322

Step 2: Since the reminder 455 ≠ 0, we apply division lemma to 322 and 455, to get

455 = 322 x 1 + 133

Step 3: We consider the new divisor 322 and the new remainder 133, and apply the division lemma to get

322 = 133 x 2 + 56

We consider the new divisor 133 and the new remainder 56,and apply the division lemma to get

133 = 56 x 2 + 21

We consider the new divisor 56 and the new remainder 21,and apply the division lemma to get

56 = 21 x 2 + 14

We consider the new divisor 21 and the new remainder 14,and apply the division lemma to get

21 = 14 x 1 + 7

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 777 and 455 is 7

Notice that 7 = HCF(14,7) = HCF(21,14) = HCF(56,21) = HCF(133,56) = HCF(322,133) = HCF(455,322) = HCF(777,455) .

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### Frequently Asked Questions on HCF of 777, 455 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 777, 455?

Answer: HCF of 777, 455 is 7 the largest number that divides all the numbers leaving a remainder zero.

3. How to find HCF of 777, 455 using Euclid's Algorithm?

Answer: For arbitrary numbers 777, 455 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.