Mathematics > Comments on Puzzle for December 1, 2015

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solution

algebra simplies problem solution

Let x5 name the amount he has when he enters the fifth store.

He spent half of x5 plus $1, and then had none left.

 

x5 - x5/2 - 1 = 0

x5/2 - 1 = 0

x5/2 = 1

x5 = 2

 

Then make equation 

 

x4 - x4 / 2 - 1 = 2

x4/2 = 3

x4 = 6

 

etc

 

x3 = (6+1)*2 = 14

x2 = (14+1)*2 = 15

x1 = (15+1)*2 = 62

 

 

posted by Kermit1941 on December 4, 2015 at 2:32 PM | link to this | reply

I am stumped.

posted by FormerStudentIntern on December 2, 2015 at 6:39 AM | link to this | reply

Image result for cartoon picture of Australia

posted by Kabu on December 1, 2015 at 4:54 PM | link to this | reply

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