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Greatest Common Divisor (GCD) of 175 and 78

The greatest common divisor (GCD) of 175 and 78 is 1.

What is the Greatest Common Divisor (GCD)?

The GCD of two integers is the largest positive integer that divides both numbers without leaving a remainder. It is useful in simplifying fractions, finding common factors, and in number theory.

How to Calculate the GCD of 175 and 78?

We use the Euclidean algorithm, which involves the following steps:

  1. Divide the larger number by the smaller number.
  2. Replace the larger number with the smaller number and the smaller number with the remainder from the division.
  3. Repeat this process until the remainder is zero.
  4. The non-zero remainder just before zero is the GCD.

Step-by-Step Euclidean Algorithm

StepCalculation
1 175 ÷ 78 = 2 remainder 19
2 78 ÷ 19 = 4 remainder 2
3 19 ÷ 2 = 9 remainder 1
4 2 ÷ 1 = 2 remainder 0

Examples of GCD Calculations

NumbersGCD
120 and 371
103 and 681
109 and 1551
117 and 153
109 and 761

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