CAT 2012 LR-DI thread Quantitative

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Hi, Puys
CAT 2011 is finally over [smiley] [smiley]
Lets start the Preparation for CAT 2012..please use this thread for all kind of LR-DI discussion,posting questions,submitting answers etc.
Here are few links for previous years DI-LR thread
Useful Links:-
http://www.pagalguy....

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Page 8 of 94

sridharaV

03 Oct '12

Hi Friends, Can you please give me tips on how to solve complex ratios,like the one I mentioned below??(3845.74*39.45-45.43*2893.67)/(27.41*1771)
It is stopping me every time I attempt a question like this.
Please guide me on it.
Thanks in advance.

nashty

03 Oct '12

@pushi 1-> 11Is the answer correct

pushi

03 Oct '12

Can we find out how many teams can score maximum points at pool stage???

pushi

03 Oct '12

---- Can anyone please tell the approach for these type of questions----16 teams participated in a tournament.
Teams are divided into tow groups of 8 .First round each team plays exactly one match against the other of the same group.In each match two points are awarded to the winning and no po...

1 1

sonamaries7

03 Oct '12

a few more:
1) what i s the no of cubes needed to completely cover a cube of size 5*5*5 which is kept in a corner of a room such that it's 2 edges are along the 2 adjacent walls?
2) if year 2005 starts with a saturday, then find the no of Sundays in those months which have 30 days.
3) wh...

torqtech

03 Oct '12

1) 8= fixed in all cases2) 12(n-2) = 12( 6-2) = 483) 6(n-2)^2= 964) 2(n-2)^2= 325) 4(n-2) = 166) (n-2)^3= 64

1 1

ashishpai2001

03 Oct '12

2 2

ashishpai2001

01:39 AM, 03 Oct '12

03 Oct '12

ďťż@sonamaries7 said:

@scrabbler : help help!Three different faces of a cube are painted in three different colours(adjacent pair of faces) - red, green and blue. This cube is now cut into 216 smaller but identical cubes.(The adjacent faces are in the same colour: red, red, then next adjacent pair in green and so on)
1). What is the number of the smaller cubes that will have exactly three faces painted ?

2). How many of the smaller cubes have exactly two faces painted ?

3). What is the number of small cubes that have exactly one face painted ?

4). What is number of small cubes that have exactly one face painted red and no other face painted ?

5). What is the number of small cubes that have one face painted green and one face blue and no other face painted ?

6). What is the numbers of cubes that have no face painted at all ?
Plz share the approach also..is there any approach other than drawing and visualizing the cube?

Would you rather byheart a formula than just draw and analyze?

Number of identical cubes = 216 = 6^3
Number of cubes per side = 6

1) To have three faces painted, the cubes will be at the corners. There are 8 corners.

2) To have exactly two faces painted, they must be at the sides but not the corners. Per side, there are (6-2) = 4 such cubes. There are 12 such sides. Hence, 48 cubes.

3) To have one face painted, the cubes must be landlocked. ie not at the sides. Thus they are located as locked squares of (6-2) dimension. There are 6 sides with 1 square each. So there are 6*4*4 = 96

4) To have only one face painted, and that too as red, it will be a third of (3), since there will be two (adjacent) sides painted red. Hence, there are 32 cubes.

5) To have two faces painted, one green and the other blue, the cubes will be located along three sides but not at those corners. ie (6-2)*3 = 12 cubes

6) To have no face painted at all, the cubes will lie within a lanlocked cube excluding the outer surface of the original. Thus cube of dimension (6-2) ie 4^3 = 64 cubes

ďťż

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sonamaries7

03 Oct '12

@scrabbler : help help!
Three different faces of a cube are painted in three different colours(adjacent pair of faces) - red, green and blue. This cube is now cut into 216 smaller but identical cubes.(The adjacent faces are in the same colour: red, red, then next adjacent pair in green and so...

Billyjeans

02 Oct '12

Yes pls post a simpler approach than the one posted above. Anyone..?@

gemini11

02 Oct '12

ANY1 WHO HAS OTHER THEN ABOVE MENTIONED APPROACH PLEASE POST

smashed

02 Oct '12

lets say u leave 'x' coins at the end for the opponent, so the opponent will lose the game if you leave 1,2 or 3 coins at the end. so 'x' can take 1,2 or 3 values.
now to be sure of winning you can match your number of coins with the opposition, so that the total is min + max (3 + 6 in this c...

gemini11

02 Oct '12

no i dont hv expltn--please people provide expltn

smashed

02 Oct '12

any explanation for the OA?according to me the person with the second chance is always winning.
EDIT : Got the ans. I had taken the lower count to be 1 instead of 3.

gemini11

01 Oct '12

PLEASE PROVIDE SIMPLE SOLUTION ALSO

decentb

01 Oct '12

gemini11

01 Oct '12

Saniya and Sonali have 50 coins on a table. Each of them can pick atleast 3 and atmost 6 coins. A person can pick lesser coins if there are less coins on the table left. The one who picks up the last coin will lose. If Saniya starts the game and both play to their best (intelligently), then how m...

jeetuachtani

01 Oct '12

Ram and Laxman are brothers of island Laxman asks u, Is atleast one from our pair is of no type? WHat u can conclude1)Ram is no laxman is yes2)Ram is yes, Laxman is no3)both r no4)both r yes

torqtech

01 Oct '12

Concept of Controlled Sum is in play here!!
Control Sum here is max+min= 1+7=8
What this means is whtever number of coins other person picks, we can always make the number reduce by 8. So whoever picks last coin is going to lose, hence our aim is to remove that last coin and then pick numb...

3 3

niloy1

01 Oct '12

@torqtech ---ya u r ryt....ab plz samjha do kaise approach karna hain eise sawaal

gangsofiim

01 Oct '12

i care to disagree with first answer .... following on Venn diagrams by Techsurge..... if i take x=99,d=32,e=34, f=35........... we get maximum B=165 A=166 C=168exactly 2 =101 and exactly 3 = 99 please tell if there is an error or mistake in my approach.......

2 2

Page 9 of 94

techsurge

01 Oct '12

for 3rd I have posted solution above and was able to find my mistakes..... but fo 2nd i can bet it has to be noneheres answer for 1st,2nd and 4th1stonly A =a;only B =b;only C =c A and B but not C =d; B and C but not A=e; A and C but not B = f; all three x1stthe approach i sued was for 1st quest...

techsurge

01 Oct '12

for these type of questions drawing venn diagrams
let studying only Aeronautics ,Biotech and Cryogenic be a,b,cstudying both A and B but not c=dstudying both B and C but not a=estudying both A and C but not b=fstudying all 3 be x
to maximise x everything else must be minimised
Now for 3r...

1 1

xitizsharma

01 Oct '12

@techsurge
The answers are
1. 149
2. 67
3. 32
4. 99
You seem to hv got the hang of it..pls share ur approach..

1 1

Ganu02

01 Oct '12

@rachit_28 For the last question you have posted..I'm getting it as 80..Can you tell me where am I going wrong..drilling-30~~~Lathe-40~~~Welding-20~~~Milling-25~~~Boring-15..
When welding can't be used then the option available are D-M-B or L-M-B..so there is two option either 80 or 70 and goi...

techsurge

01 Oct '12

@xitizsharma mere answers kuch is parakar hain
1....1482 None3 324....98
if correct ....... will post approach..........took half an hour to solve each....just hoping sahi hoon

xitizsharma

30 Sep '12

puys..here is a tricky question..pls solve it nd do share ur approach..wud be beneficial for us all..There is a group of 200 students, where each student studies one or more of the three subjects among Aeronautics, Biotechnology and Cryogenics. The number of students studying cryogenics is more t...

1 1

torqtech

30 Sep '12

1) A2) C3) D4) D5) Options seem wrong.
Confirm the answers then I'll edit and post the explanations.

1 1

niloy1

30 Sep '12

@niloy1 koi to reply karo :(

rachit_28

29 Sep '12

https://www.dropbox.com/s/psq03tsmkp3h7jl/DI.docx
@Estallar12 bhai isko kam time mein karne ka koi tarika batao pls. :)@grkkrg

rachit_28

28 Sep '12

g_ankit

28 Sep '12

80 ?? OA please

rachit_28

28 Sep '12

There are five different machines in a factory €“ Lathe, Drill, Boring, Milling and Welding. Each of the four products €“ A, B, C and D €“ is manufactured by using a distinct combination of exactly three out of these five machines. Drill machine is never used in conjunction with Lathe machine....

kejriwalsonal1

28 Sep '12

4..?

niloy1

28 Sep '12

Games and tournaments Set 3 ( Revising concepts ) :-Raju and Radhika are playing a game which involves picking up coins kept on a table. Each person in his/her turn has to pick a minimum of 1 and a maximum of 7 coins, until all the coins are picked up by the players. Assume that both players are ...

Mohitinfy123

27 Sep '12

@g_ankit its 4th.....can someone tell me that sign wali approach "~".

g_ankit

27 Sep '12

wats the OA ??

g_ankit

27 Sep '12

C) Pankaj

HeCtEr

27 Sep '12

@tequierocr7 @PriyankaMitra and whoever else bothered to try it is pankaj

aimingCAT12

27 Sep '12

option 4! interpret the premise this way..it says "Rajesh goes to a temple, if it is a Friday"..we can say for sure that Rajesh goes to the temple every Friday..nothing can be inferred about his going/not going to the temple on other days (he may or may not). So a definite negation would be that ...

2 2

get2memohit

27 Sep '12

Option 4

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