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GMAT PREP : Integers
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malolakrupa
- Senior | Next Rank: 100 Posts
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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
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
-
malolakrupa
- Senior | Next Rank: 100 Posts
- Posts: 58
- Joined: Fri Jul 18, 2008 12:26 pm
- Thanked: 2 times
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
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
