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 Post subject: Got a dime?Posted: Fri, 22 Jun 2012 01:25:23 UTC
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Joined: Sun, 24 Jul 2005 20:12:39 UTC
Posts: 3692
Location: Ottawa Ontario

A,B,C,D and E are sitting at a table, each with
a pile of dimes in front of them.
I'm using dimes instead of say, marbles, because
marbles would probably roll off the table!

A has a dimes, B has b dimes, C has c dimes,
D has d dimes and E has e dimes.

A gives each of the other 4 guys enough dimes
to double what each has; like D now has 2d dimes.

Next, B gives each of the other 4 guys enough dimes
to double what each has; like D now has 4d dimes.

This continues; C is next, then D, then E.

Each guy now has 160 dimes; total of 800 dimes.
(good thing I didn't use marbles, right?)

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 Post subject: Re: Got a dime?Posted: Sat, 23 Jun 2012 06:44:01 UTC
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Joined: Mon, 23 Feb 2009 23:20:33 UTC
Posts: 1049
Start from the end and work backwards.

They finish with 160, 160, 160, 160, and 160.
So before E's turn they must have had 80, 80, 80, 80, and 480. And just keep going.

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 Post subject: Re: Got a dime?Posted: Sat, 23 Jun 2012 07:04:30 UTC
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Posts: 3692
Location: Ottawa Ontario
YEP! Thassa da trick!

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