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N is divisible by 65
When N= 2535 ( which is equal to 65 * 39 ) .
In this case N is divisible by both 65 and 39 .
When N = 65 , N is divisible by 65 and not 39 .
Hence 1 is not sufficient ..
- by msbinu
Mon Nov 22, 2010 6:23 am- Forum: Data Sufficiency
- Topic: Is n Divisible by 39?
- Replies: 2
- Views: 1326
isn't the answer 2??
0! = 1 (which is a perfect square )
1! = 1 which is also a perfect square
so total 2
Regards,
Binu
- by msbinu
Thu Oct 21, 2010 6:05 am- Forum: Problem Solving
- Topic: My Wrong Ones...
- Replies: 21
- Views: 4403
Let the CP for 1 is 1 .
CP for 20 = 20
Let SP for 1 is y
From the given info 20 * 1 = 25 * y
hence y = 20/25 = .8
CP of 1 is 1 and SP for 1 is .8
Hence loss is 20 %
- by msbinu
Tue Oct 19, 2010 8:16 am- Forum: Problem Solving
- Topic: cost price of 20 articles .........
- Replies: 6
- Views: 8421
But why dont we have to use permutation also in this sum? Since the sum hints at arrangement ..please help,im confused. Hi , We can use permutation also to solve this. 1 letter code can be selected from 26 letters using 26P1 ways = 26!/25! = 26 2 letter code could be selected in 26P1 * 26 P 1 ways ...
- by msbinu
Mon Sep 27, 2010 8:19 am- Forum: Problem Solving
- Topic: Combination
- Replies: 4
- Views: 1573
A square is drawn by joining the midpoints of the sides of a given square. A third square is drawn inside the second square in the same way and this process continues indefinitely. If the side of the first square is 4 cm .determine the sum of the areas of the squares. A. 32 sq.units B. 48 sq.units ...
- by msbinu
Wed Sep 22, 2010 8:42 am- Forum: Problem Solving
- Topic: Find the sum of the areas of the squares ...................
- Replies: 5
- Views: 1815
Is it A?pzazz12 wrote:A is two years older than B who is twice as old as C. If the total of the ages of A, B and C be 27, the how old is B?
(A)10
(B)33
(C)7
(D)8
(E)11
A=B+2
B=2C
A+B+C=27
B+2 + B + B/2 = 27
Solving for B , you will get B =10
- by msbinu
Wed Sep 22, 2010 5:34 am- Forum: Problem Solving
- Topic: An intresting question from ps..............
- Replies: 5
- Views: 1282
A square is drawn by joining the midpoints of the sides of a given square. A third square is drawn inside the second square in the same way and this process continues indefinitely. If the side of the first square is 4 cm .determine the sum of the areas of the squares. A. 32 sq.units B. 48 sq.units ...
- by msbinu
Wed Sep 22, 2010 5:31 am- Forum: Problem Solving
- Topic: Find the sum of the areas of the squares ...................
- Replies: 5
- Views: 1815
- by msbinu
Wed Sep 22, 2010 5:26 am- Forum: Problem Solving
- Topic: Interesting GMATFix Problem-15
- Replies: 7
- Views: 1319
Ohh .. I missed that .... My mistakeThe question states "units digit of...k is nonzero", therefore it should be A
- by msbinu
Wed Sep 22, 2010 5:23 am- Forum: Data Sufficiency
- Topic: Integer and Statistic
- Replies: 6
- Views: 1448
Hi Selango Tens digit of k+9 is 3. Whatever the unit digit[1..9],when it added with 9,1 is added with tens digit. So tens digit must be always 2 and when added with 1 makes it 3. I think this is not right . What if the unit digit of K is 0 , Then the statement "Whatever the unit digit[1..9],whe...
- by msbinu
Tue Sep 21, 2010 8:00 am- Forum: Data Sufficiency
- Topic: Integer and Statistic
- Replies: 6
- Views: 1448
Rules of triangle are 1. length of any side cannot be greater that the sum of other 2 2. Length cannot be shorter than difference of other sides Applying rule 2 Length of third cannot be shorter than 2 . Let the length be 3 . its > 2 and <= 22 ( rule 1 ) length 4 : > 2 and < = 22 . . Length 10 > 2 a...
- by msbinu
Fri Sep 10, 2010 9:14 am- Forum: Problem Solving
- Topic: integer values of 'x'
- Replies: 17
- Views: 4872
590 in GMAT
I just finished my GMAT ,... Got only 590 ( Q 45 V27 ) . I was consistently getting around 640 - 680 in all practice tests... NOt sure wht to do now ... 
.. Any suggestion ?
- by msbinu
Wed Jun 23, 2010 3:28 am- Forum: GMAT Strategy
- Topic: 590 in GMAT
- Replies: 1
- Views: 981