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What is the least positive integer
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03 Aug 2014, 09:49
Question Stats:
79% (01:33) correct 21% (01:56) wrong based on 128 sessions
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What is the least positive integer that when divided by 3,6,9 leaves remainders of 2 in each case but is perfectly divisible by 11? A) 33 B) 77 C)110 D) 121 Besides plugging in, can you tell me if there is another method of solving this problem? I mean just for a conceptual understanding. Source: 4gmat
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Re: What is the least positive integer
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03 Aug 2014, 15:34
3=3*1, 6=3*2, 9=3*3, so, Least Common Multiple [3,6,9] = 3*3*2=18 Let A=18X+2 = 11Y, when X =6, Y= 10, A=110



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Re: What is the least positive integer
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03 Aug 2014, 23:56
alphonsa wrote: What is the least positive integer that when divided by 3,6,9 leaves remainders of 2 in each case but is perfectly divisible by 11?
A) 33 B) 77 C)110 D) 121
Besides plugging in, can you tell me if there is another method of solving this problem? I mean just for a conceptual understanding.
Source: 4gmat I think the fastest way is try and error. I use the tips that try from E to A, instead of A to E, will save more time. I got C
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Re: What is the least positive integer
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06 Aug 2014, 03:41
alphonsa wrote: What is the least positive integer that when divided by 3,6,9 leaves remainders of 2 in each case but is perfectly divisible by 11?
A) 33 B) 77 C)110 D) 121
Besides plugging in, can you tell me if there is another method of solving this problem? I mean just for a conceptual understanding.
Source: 4gmat All are divisibly by 11 33 is divisible by 3; so ruled out 77 is 5 far from 72 (divisible by 9); so ruled out 110 best fits in Answer = C Does this question came up with only 4 options??
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Re: What is the least positive integer
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06 Aug 2014, 23:26
PareshGmat wrote: alphonsa wrote: What is the least positive integer that when divided by 3,6,9 leaves remainders of 2 in each case but is perfectly divisible by 11?
A) 33 B) 77 C)110 D) 121
Besides plugging in, can you tell me if there is another method of solving this problem? I mean just for a conceptual understanding.
Source: 4gmat All are divisibly by 11 33 is divisible by 3; so ruled out 77 is 5 far from 72 (divisible by 9); so ruled out 110 best fits in Answer = C Does this question came up with only 4 options?? This question came with no options .. Now can you help me solving it, considering no options were given?



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Re: What is the least positive integer
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07 Aug 2014, 01:52
alphonsa wrote: PareshGmat wrote: alphonsa wrote: What is the least positive integer that when divided by 3,6,9 leaves remainders of 2 in each case but is perfectly divisible by 11?
A) 33 B) 77 C)110 D) 121
Besides plugging in, can you tell me if there is another method of solving this problem? I mean just for a conceptual understanding.
Source: 4gmat All are divisibly by 11 33 is divisible by 3; so ruled out 77 is 5 far from 72 (divisible by 9); so ruled out 110 best fits in Answer = C Does this question came up with only 4 options?? This question came with no options .. Now can you help me solving it, considering no options were given? GMAT questions tend to have 5 options; else this question would be "open ended" As far as your question goes to find out the appropriate numbers, please refer diagram below: Wrote down table of 3, added 2 in next column, table of 6, added 2 in next column, table of 9, added 2 in next column Highlighted the numbers which appear common in all +2 columns & checked divisibility by 11 which gives the result What I discovered is, starting 110, just add 198 to get the next number 110 + 198 = 308 308 + 198 = 506 506 + 198 = 704 All the above 3 results fulfil the divisibility/ remainder requirement
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Re: What is the least positive integer
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07 Aug 2014, 03:57
Just check if (n2) is divisible by 3,6 and 9. Plug in the options in place of 'n'



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