Determine whether the first number is divisible…

Discussion in 'Mathematics' started by Sepediny, May 27, 2015.

  1. Sepediny

    Sepediny New Member

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    Determine whether the first number is divisible by the second number 120; 3 (yes or no)
     
  2. Celaira

    Celaira New Member

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    Yes. Here's a trick that works with 'divisible by 3': — Take the original number … … . 120- Add up its digits … … … 1+2+0=3- If the sum of the digits is divisible by 3, then the big number is too. 3 is divisible by 3, so 120 is too.
     

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