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OG 13 #51

by sbru28 » Mon Dec 03, 2012 4:40 pm
Can someone please explain to me how the answer is B? I thought the correct answer was E and the back of the OG isnt making much sense to me.


Q: If y is an integer, then the least possible value of [23-5y] is... brackets are supposed to indicate absolute value.

a-1
b-2
c-3
d-4
e-5

thanks
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by Brent@GMATPrepNow » Mon Dec 03, 2012 5:08 pm
sbru28 wrote:Can someone please explain to me how the answer is B? I thought the correct answer was E and the back of the OG isnt making much sense to me.


Q: If y is an integer, then the least possible value of [23-5y] is... brackets are supposed to indicate absolute value.

a-1
b-2
c-3
d-4
e-5

thanks
When posting questions, please use the spoiler function to hide the correct answer. This will allow others to attempt the question without seeing the final answer.


Okay, onto your query.
You have answered a question different from the one posed. You've answered the question, "What value of y will yield the least possible value of |23 - 5y|?"

So, when y = 5, |23 - 5y| = |23 - 5(5)| = |-2| = 2 (and 2 is the smallest possible value of |23 - 5y|)

However, the question asks, "What is the least possible value of |23 - 5y|?
So, the least possible value of |23 - 5y| is 2 (and this occurs when y = 5)

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
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