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3 responses

1. 

   Anya Scoble-Hansen

   16 January, 2013

   It need to be cut seven times

   You basically double the number, so you get 1,2,4,8,16,32,64,128… Etc.

   The commas indicate a cut

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   1. 

      David

      16 January, 2013

      Well done – your answer looks good to me!

      Here’s a follow-up question:

      Unfortunately, Mari doesn’t have any fancy pizza cutting gizmos, and it takes him one cut to cut one piece of pizza in half. How many cuts does it take for Mario to have 100 pieces of pizza?

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      1. 

         Anya Scoble-Hansen

         16 January, 2013

         (This is my thought process)

         Hmmm…

         First 1… Then 2…. Then 3…. Then 4….

         Continue the pattern, would probably be 99…. Because you need one cut for two slices, two cuts for three slices, three cuts for four slices, etc. So that means 99 cuts for 100 slices

         My answer: Mari will need to cut the pizza ninety-nine times to get one hundred slices of pizza

         Thanks for the questions! I need to use my brain during the holidays! Oh, and my mum works at CSIRO too, in the Parkville “campus”

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