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 Post subject: Group 1 Consortium 2012 question 41Posted: Wed Jan 07, 2015 7:54 pm

Joined: Thu Oct 18, 2012 9:41 am
Posts: 440
DD makes this answer 29 - is this correct

Many thanks

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Charlie enjoys eating Nickel Bars

His local store has a special promotion on Nickel bars. charlie can exchange 3 empty Nickel bar wrappers for a new Nickel bar.

Charlie buys 20 Nickel bars.

Assuming that Charlie always eats any Nickel bars he has and exchanges the used wrappers for new bars, how many bars will be be able to eat in total?

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 Post subject: Re: Group 1 Consortium 2012 question 41Posted: Wed Jan 07, 2015 8:09 pm

Joined: Mon Oct 06, 2014 12:18 pm
Posts: 356
My calculation also says 29

For 20 bars, he will be able to get 6 more bars(exchanging 18 of the wrappers) with still two wrappers left in hand. So from those eight wrappers he will get 2 more bars with two wrappers remaining and then from the last four wrappers he will get 1 more bar , total 29

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 Post subject: Re: Group 1 Consortium 2012 question 41Posted: Wed Jan 07, 2015 9:20 pm

Joined: Thu Oct 18, 2012 9:41 am
Posts: 440
Great thank you

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