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Greatest Common Factor

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Greatest Common Factor

Calculate the Greatest Common Factor or GCF of 58, 192 and 236

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The instructions to find the GCF of 58, 192 and 236 are the next:

1. Decompose all numbers into prime factors

58	2
29	29
1

192	2
96	2
48	2
24	2
12	2
6	2
3	3
1

236	2
118	2
59	59
1

2. Write all numbers as the product of its prime factors

Prime factors of 58	=	2 . 29
Prime factors of 192	=	2⁶ . 3
Prime factors of 236	=	2² . 59

3. Choose the common prime factors with the lowest exponent

Common prime factors: 2

Common prime factors with the lowest exponent: 2¹

4. Calculate the Greatest Common Factor or GCF

Remember, to find the GCF of several numbers you must multiply the common prime factors with the lowest exponent.

GCF = 2¹ = 2

Also calculates the:

Least Common Multiple or LCM of 58, 192 and 236

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