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A store sells erasers for 0.23$per piece and pencil for 0.1 [#permalink] Show Tags 26 Jul 2014, 09:36 2 This post received KUDOS 2 This post was BOOKMARKED 00:00 Difficulty: 15% (low) Question Stats: 80% (01:58) correct 20% (00:47) wrong based on 171 sessions HideShow timer Statistics A store sells erasers for 0.23$ per piece and pencil for 0.11$per piece. How many eraser and pencils did Jessica buy? (1) She bough 5 erasers (2) She spent total of 1.70$
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Re: A store sells erasers for 0.23$per piece and pencil for 0.1 [#permalink] Show Tags 26 Jul 2014, 09:47 A store sells erasers for 0.23$ per piece and pencil for 0.11$per piece. How many eraser and pencils did Jessica buy? (1) She bough 5 erasers. Clearly insufficient. (2) She spent total of 1.70$ --> $$0.23e+0.11p=1.70$$ --> $$23e+11p=170$$ --> by trial and error we can find that the only non-negative integer solution for this equation is e=5 and p=5. Sufficient.

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Re: A store sells erasers for 0.23$per piece and pencil for 0.1 [#permalink] Show Tags 26 Jul 2014, 09:47 Bunuel wrote: A store sells erasers for 0.23$ per piece and pencil for 0.11$per piece. How many eraser and pencils did Jessica buy? (1) She bough 5 erasers. Clearly insufficient. (2) She spent total of 1.70$ --> $$0.23e+0.11p=1.70$$ --> $$23e+11p=170$$ --> by trial and error we can find that the only non-negative integer solution for this equation is e=5 and p=5. Sufficient.

Similar questions to practice:
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martha-bought-several-pencils-if-each-pencil-was-either-a-100204.html
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joanna-bought-only-0-15-stamps-and-0-29-stamps-how-many-101743.html

Hope it helps.
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Re: A store sells erasers for 0.23$per piece and pencil for 0.1 [#permalink] Show Tags 16 Aug 2016, 10:15 Hello from the GMAT Club BumpBot! Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos). Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email. _________________ Re: A store sells erasers for 0.23$ per piece and pencil for 0.1   [#permalink] 16 Aug 2016, 10:15
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