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A shop sells each chocolate for $1 . however , if any

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A shop sells each chocolate for $1 . however , if any  [#permalink]

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New post 22 Oct 2019, 09:07
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E

Difficulty:

  55% (hard)

Question Stats:

43% (01:04) correct 57% (00:59) wrong based on 42 sessions

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A shop sells each chocolate for $1 . however , if any purchaser returns three empty wrappers , he will get a free chocolate. If John has a total of $15 how many chocolate can he get at total ?

a. 15
b. 19
c. 20
d. 21
e. 22

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A shop sells each chocolate for $1 . however , if any  [#permalink]

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New post 22 Oct 2019, 09:16
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jackfr2 wrote:
A shop sells each chocolate for $1 . however , if any purchaser returns three empty wrappers , he will get a free chocolate. If John has a total of $15 how many chocolate can he get at total ?

a. 15
b. 19
c. 20
d. 21
e. 22

Posted from my mobile device


Given:
1. A shop sells each chocolate for $1 .
2. however , if any purchaser returns three empty wrappers , he will get a free chocolate.

Asked: If John has a total of $15 how many chocolate can he get at total ?

He can get 15 chocolates for $15.
But he can exchange 15 wrappers (5 sets of 3 empty wrappers) to get 5 chocolates more
Further he can exchange 1 more set of 3 empty wrappers to get 1 more chocolate
Now he can exchange 1 more set of 3 empty wrappers to get 1 more chocolate.

Total chocolates = 15 + 5 + 1 + 1 = 22

IMO E
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Re: A shop sells each chocolate for $1 . however , if any  [#permalink]

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New post 26 Oct 2019, 08:50
jackfr2 wrote:
A shop sells each chocolate for $1 . however , if any purchaser returns three empty wrappers , he will get a free chocolate. If John has a total of $15 how many chocolate can he get at total ?

a. 15
b. 19
c. 20
d. 21
e. 22

Posted from my mobile device



John can buy 15 chocolates and return 15 wrappers for 5 more free chocolates. He can then return 3 of 5 extra wrappers to get 1 more chocolate. Finally, he can return the wrapper from this chocolate and the 2 extra wrappers he had earlier to get 1 last chocolate. Therefore, he can get a total of 15 + 5 + 1 + 1 = 22 chocolates.

Answer: E
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Re: A shop sells each chocolate for $1 . however , if any   [#permalink] 26 Oct 2019, 08:50
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