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Weekly Problem 17 - 2011

Stage: 2 and 3 Short Challenge Level: Challenge Level:1

After every two numbers, one is omitted. Because $89 = 2\times 44 +1$, there must be $44$ page numbers missing and so the number on the last page is $89+44=133$.
 
 
 

This problem is taken from the UKMT Mathematical Challenges.

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