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

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Senior Manager
Joined: 27 Aug 2007
Posts: 253
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Four staff members at a certain company worked on a project. [#permalink]  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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Joined: 08 Jun 2005
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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.

Senior Manager
Joined: 27 Aug 2007
Posts: 253
Followers: 1

Kudos [?]: 10 [0], given: 0

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.

NO words, clear and precise
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