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A shopkeeper mentally reversed the digits of a customers correct amou
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28 Jan 2024, 23:31
28 Jan 2024, 23:31
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Question Stats:
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A shopkeeper mentally reversed the digits of a customer’s correct amount of change and thus gave the customer an incorrect amount of change. If his collection showed 54 cents less than it should have, which of the following could be the correct amount of change in cents?
(A) 24
(B) 35
(C) 64
(D) 75
(E) 93
(A) 24
(B) 35
(C) 64
(D) 75
(E) 93
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Free Materials for the GRE General Exam - Where to get it!!
GRE Geometry Formulas
GRE - Math Book
Re: A shopkeeper mentally reversed the digits of a customers correct amou
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29 Jan 2024, 05:58
29 Jan 2024, 05:58
1
Just reverse the number in each option and subtract both. Whichever option gives 54 that is the answer.
Generalized approach
10a + b - (10b + a) = 54
a - b = 6
Possibilities are
9 3
8 2
7 1
93 - 39 = 54
82 - 28 = 54
71 - 17 = 54
93 is in options
Generalized approach
10a + b - (10b + a) = 54
a - b = 6
Possibilities are
9 3
8 2
7 1
93 - 39 = 54
82 - 28 = 54
71 - 17 = 54
93 is in options
gmatclubot
Re: A shopkeeper mentally reversed the digits of a customers correct amou [#permalink]
29 Jan 2024, 05:58
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