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Four staff members at a certain company worked on a project.

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Senior Manager
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Four staff members at a certain company worked on a project. [#permalink] New post 17 Nov 2007, 05:42
Four staff members at a certain company worked on a project. The amounts of time that the four staff members worked on the project were in the ratio 2 to 3 to 5 to 6. If one of the four staff members worked on the project for 30 hours, which of the following CANNOT be the total number of hours that the four staff members worked on the project?

A. 80
B. 96
C. 160
D. 192
E. 240
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 [#permalink] New post 17 Nov 2007, 06:30
2:3:5:6 = sum = 16

80/16 = 5

96/16 = 6

160/16 = 10

192/16 = 12

240/16 = 15

only 12 is not a multiply of 30 - so the ratio of 2:3:5:6 cannot be solved.

the answer is (D)

:)
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Joined: 27 Aug 2007
Posts: 255
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 [#permalink] New post 17 Nov 2007, 06:46
KillerSquirrel wrote:
2:3:5:6 = sum = 16

80/16 = 5

96/16 = 6

160/16 = 10

192/16 = 12

240/16 = 15

only 12 is not a multiply of 30 - so the ratio of 2:3:5:6 cannot be solved.

the answer is (D)

:)


NO words, clear and precise :lol:
  [#permalink] 17 Nov 2007, 06:46
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