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Finding last two digits

  1. May 13, 2006 #1
    How does one solve problems like these :

    finding last two digits of 4^ 300
     
  2. jcsd
  3. May 13, 2006 #2

    Tide

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    One simple way is to look for patterns. For example, the last digit of powers of 4 alternate between 4 and 6. Can you relate that to the number of factors of 4?
     
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