mastermind Posted April 23, 2006 Share Posted April 23, 2006 i got this from Lawrence post in "just finished my GMAT forum" Which integer is a not divisor for 64, k70 where k is any positive integer A 2 B 3 C 4 D 5 E 7 is it C Quote Link to comment Share on other sites More sharing options...
roody Posted April 23, 2006 Share Posted April 23, 2006 B we can easily eliminate option A C D abt E if we take k as 1 we can divide that no by 7 so remaining is 3 Quote Link to comment Share on other sites More sharing options...
mastermind Posted April 23, 2006 Author Share Posted April 23, 2006 if k=2 then 270 is divisible by 3..... Quote Link to comment Share on other sites More sharing options...
roody Posted April 23, 2006 Share Posted April 23, 2006 yup i did that in a hurry C is the answer Quote Link to comment Share on other sites More sharing options...
garbage100 Posted April 23, 2006 Share Posted April 23, 2006 64, k70 a. Since it ends with 0, it is divisible by 2 b. If k is 1 then its divisble by 3 c. Since the last two digits are NOT divisible by 4, whatever the value k may be - the number will not be a multiple of 4. Hence this is the answer d. since the number ends with "0" it is a divisible by 5. e. if k is 4, then the number is divisble by 7. Quote Link to comment Share on other sites More sharing options...
akhilesh_76 Posted April 24, 2006 Share Posted April 24, 2006 Agree with Garbage's explanation Quote Link to comment Share on other sites More sharing options...
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