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Popular Pre Algebra >

Find the GCF 63 , 45 , 81

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Solution

gcd

Solution

9
Solution steps
63,45,81
Prime factorization of 63:3⋅3⋅7
63
63divides by 363=21⋅3=3⋅21
21divides by 321=7⋅3=3⋅3⋅7
3,7 are all prime numbers, therefore no further factorization is possible=3⋅3⋅7
Prime factorization of 45:3⋅3⋅5
45
45divides by 345=15⋅3=3⋅15
15divides by 315=5⋅3=3⋅3⋅5
3,5 are all prime numbers, therefore no further factorization is possible=3⋅3⋅5
Prime factorization of 81:3⋅3⋅3⋅3
81
81divides by 381=27⋅3=3⋅27
27divides by 327=9⋅3=3⋅3⋅9
9divides by 39=3⋅3=3⋅3⋅3⋅3
The prime factors common to 63,45,81 are =3⋅3
Multiply the numbers: 3⋅3=9=9

Popular Examples

Convert to a Simplified Fraction 1.76Evaluate 49*49Convert to a Mixed Number 47/12Find the Possible Factors 576Evaluate 100-29

Frequently Asked Questions (FAQ)

  • What is gcd 63,45,81 ?

    The solution to gcd 63,45,81 is 9

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