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The figure above shows an example of a 4-digit customer identification

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The figure above shows an example of a 4-digit customer identification  [#permalink]

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New post 24 Dec 2018, 12:19
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  45% (medium)

Question Stats:

50% (01:27) correct 50% (01:16) wrong based on 48 sessions

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The figure above shows an example of a 4-digit customer identification code. If the digits in the code must appear in descending numerical order and no digit can be used more than once, what is the difference between largest and smallest possible codes?

A. 6666
B. 5555
C. 5432
D. 4444
E. 1111

Source: Kaplan GMAT Math Workbook - Sixth Edition
Page# 307

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Re: The figure above shows an example of a 4-digit customer identification  [#permalink]

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New post 24 Dec 2018, 12:30
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SajjadAhmad wrote:
Attachment:
AAAA.jpg


The figure above shows an example of a 4-digit customer identification code. If the digits in the code must appear in descending numerical order and no digit can be used more than once, what is the difference between largest and smallest possible codes?

A. 6666
B. 5555
C. 5432
D. 4444
E. 1111

Source: Kaplan GMAT Math Workbook - Sixth Edition
Page# 307

4 digit,Max Number=9999
Since no repeatetion and descending required,4 digit max number=9876
Similarly smallest 4 digit number-1000
Same conditions so smallest 4 digit number-3210
Difference-9876-3210=6666

Ans: A
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Re: The figure above shows an example of a 4-digit customer identification   [#permalink] 24 Dec 2018, 12:30
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The figure above shows an example of a 4-digit customer identification

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