toddrud wrote:

I can set up the equation for GMAT CLUB TEST 15 problem 20 but cannot seem to solve. Is there anyone that can break this down for me? I am banging my head up against the wall in frustration. (see below).

Tom read a book containing 480 pages by reading the same number of pages each day. If he would have finished the book 5 days earlier by reading 16 pages a day more, how many days did Tom spend reading the book?

(C) 2008 GMAT Club - m15#20

10

12

15

16

18

Any help is much appreciated!

Better work with choices....

E is out straightaway because 480/18 is not an integer....Tom can not read pages in fractions....

Now With choices...

A

480/10 = 48 pages add 16 pages 64 480/64 doesnt gives 5 days (not an integer)

B

480/12 = 40 pages add 16 pages 56 480/56 doesnt gives 7 days (not an integer)

C

480/15 = 32 pages add 16 pages 48 gives 480/48 as 10 days......Answer...

No need to check D

Hope this helps ......( I would better avoid forming equations in this case)

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CONSIDER AWARDING KUDOS IF MY POST HELPS !!!