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rdennington Group Title

Find the greatest common factor of 270 and 360

  • 2 years ago
  • 2 years ago

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  1. waterineyes Group Title
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    Divide 360 by 270 and get the remainder first...

    • 2 years ago
  2. rdennington Group Title
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    ok, 1.3

    • 2 years ago
  3. waterineyes Group Title
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    Or second thing you can do is to take prime factors of 270 and 360..

    • 2 years ago
  4. satellite73 Group Title
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    they are both fairly obviously divisible by 10 it is also clear that they are both divisible by 9? 27 is, as is 36 so we know they are both divisible by 90

    • 2 years ago
  5. rdennington Group Title
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    i have to break it down.

    • 2 years ago
  6. rdennington Group Title
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    into exponents.

    • 2 years ago
  7. satellite73 Group Title
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    therefore the greatest common factor is at least 90 \[360\div 90=4,270/90=3\] so 90 is the answer

    • 2 years ago
  8. cwrw238 Group Title
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    i did this one a while ago find prime factors and look for common values 270 = 2*3*3*3*5 360 = 2*2*2*3*3*5 GCF = 2*3*3*5 = 90

    • 2 years ago
  9. rdennington Group Title
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    "(Give the answer in the numerical form in the top box and in exponential form by filling in the boxes for exponents.)"

    • 2 years ago
  10. waterineyes Group Title
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    No. do not divide it properly see do like this: |dw:1340813241962:dw| Get the remainder 90?? This is not the answer yet.. Now divide the divisor 270 by the remainder ie 90... If it is wholly divisible then 90 is the GCF...

    • 2 years ago
  11. satellite73 Group Title
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    really? sometimes you need to do that if it is not completely obvious, but in this case that is a total waste of time. they are both divisible by 90 from your eyeballs

    • 2 years ago
  12. cwrw238 Group Title
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    thats 2*3^2 * 5

    • 2 years ago
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