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GMAT PREP : Integers

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Master | Next Rank: 500 Posts
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by Sunny22uk » Thu Jul 31, 2008 12:35 pm
I didn't get any result when I did a search for this question, please help. the OA is b
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by malolakrupa » Thu Jul 31, 2008 1:29 pm
Lets substitute

1 - k > 35

let k be 36 + 5 = 41 , but if k is 40 then k+ 5 = 45 . Hence cannot firmly decide between 3 or 4


2 - but if units digits is greater than 5 , then we have numbers from 6 through 9 , which means k + 5 = 46 , 47 , 48 , 49

So 2 is sufficient . Hence B
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by malolakrupa » Thu Jul 31, 2008 1:30 pm
Lets substitute

1 - k > 35

let k be 36 + 5 = 41 , but if k is 40 then k+ 5 = 45 . Hence cannot firmly decide between 3 or 4


2 - but if units digits is greater than 5 , then we have numbers from 6 through 9 , which means k + 5 = 46 , 47 , 48 , 49

So 2 is sufficient . Hence B
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by Sunny22uk » Thu Jul 31, 2008 2:15 pm
Thanks malolakrupa, I don't know what I was thinking. it is a a pretty simple problem.thanks again.
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