Official Quant thread for CAT 2013

@anytomdickandhary said:
Crux of the problem: many of us are tempted to make all the variables equal. This technique would help only when expression is cyclical in nature. for example (ab,bc,ca) is cyclical, i.e if we replace a by b, b by c and c by a ...we get back the original expression. But a closer look reveals that all the terms inside the bracket are not fully cyclical. Hence variables are not interchangeable out of all the five values i.e a+b+c, b+c+d, c+d+e, d+e+f, e+f+g we observe that terms containing a,d,g are disjoint. i.e if any expression contains a then it does not contain d and g. so we set a=d=g=1/3 and rest all the other variables = 0.ATDH.
__/\__ Thanks a lot sirjee...wasn't getting a solution for this problem.. Nothing wonders me more about you except your timing :P
Nothing else wonders me because now i am used to being in awe!!
@ScareCrow28 said:
nai dost
ya..made a mistake

1/3 atleast now i hope its correct
A railway line passes through (in order) the 11 stations A, B, ... , K. The distance from A to K is 56. The distances AC, BD, CE, ... , IK are each = 17. The distance between B and G is

(1) 21 (2) 23 (3) 27 (4) 29 (5) 31
@gautam22 said:
29?
...wats ur approach??
@gautam22 said:
29?
..wats ur approach??

@nick_baba said:
A railway line passes through (in order) the 11 stations A, B, ... , K. The distance from A to K is 56. The distances AC, BD, CE, ... , IK are each = 17. The distance between B and G is (1) 21 (2) 23 (3) 27 (4) 29 (5) 31
29?
@nick_baba said:
A railway line passes through (in order) the 11 stations A, B, ... , K. The distance from A to K is 56. The distances AC, BD, CE, ... , IK are each = 17. The distance between B and G is (1) 21 (2) 23 (3) 27 (4) 29 (5) 31
29 it is!!

Distribution is like this:
____A__B__C__D__E__F__G__H__I__J__K____
______5__6__6__5__6__6__5__6__6__5___
BG=29

@mailtoankit said:
29?
@ScareCrow28 said:
29 it is!!
@nick_baba said:
A railway line passes through (in order) the 11 stations A, B, ... , K. The distance from A to K is 56. The distances AC, BD, CE, ... , IK are each = 17. The distance between B and G is (1) 21 (2) 23 (3) 27 (4) 29 (5) 31
A B C D E F G H I J K

let A to D = 17

A to B = 5
B to C = 6
C to D = 6

B to E = 17

B to C = 6
C to D = 6
D to E = 5

C to F = 17

C to D = 6
D to E = 5
E to F = 6

D to G = 17

D to E = 5
E to F = 6
F to G = 6

distance from B to G = 29
@ScareCrow28 said:
29 it is!!Distribution is like this: ____A__B__C__D__E__F__G__H__I__J__K__________5__6__6__5__6__6__5__6__6__5___BG=29
ye random uthaye hain kya???...kis tarah cal kara hai??
@jain4444 said:
A B C D E F G H I J K let A to D = 17 A to B = 5 B to C = 6 C to D = 6 B to E = 17 B to C = 6 C to D = 6 D to E = 5 C to F = 17 C to D = 6 D to E = 5 E to F = 6 D to G = 17 D to E = 5 E to F = 6 F to G = 6 distance from B to G = 29
badiya bhai..
@anytomdickandhary said:
Crux of the problem: many of us are tempted to make all the variables equal. This technique would help only when expression is cyclical in nature. for example (ab,bc,ca) is cyclical, i.e if we replace a by b, b by c and c by a ...we get back the original expression. However, in the problem under consideration a closer look reveals that all the terms inside the bracket are not fully cyclical. Hence variables are not interchangeable out of all the five values i.e a+b+c, b+c+d, c+d+e, d+e+f, e+f+g we observe that terms containing a,d,g are disjoint. i.e if any expression contains a then it does not contain d and g. so we set a=d=g=1/3 and rest all the other variables = 0.ATDH.
__/\__.pranam sirji..sir aap kaise soch lete ho is tarah..???..amazing hai sirji...thoda hmein bhi bataein..
@nick_baba said:
ye random uthaye hain kya???...kis tarah cal kara hai??
Random nai "uthaye" hai.. 😛
Let: AD=DG=GJ=17
=> IJ=51..Hence JK=5 (since total=56)
Then make IK=17
Then put values.. values satisfied..hence it is one of the possible cases..hence the answer
@gautam22 said:
sir 5757575755....karne pe bhi to ho jayega ek minute check karna
many distribution cases possible.. fortuantely our answers are different to prove this :P
Edit : That's why i said "one of the possible cases" in the above post :P
@nick_baba said:
__/\__.pranam sirji..sir aap kaise soch lete ho is tarah..???..amazing hai sirji...thoda hmein bhi bataein..
Thanks for complement mate.

On a lighter note:

Q: aap kaise soch lete ho is tarah..???
Ans: I dont know

"thoda hmein bhi bataein.."
Ans: Sir, last 8 years se PG pe share kar raha hun jitna mujhe aata hai.

ATDH.


@gautam22 said:
arey han sir mera to 31 aa raha hai maine 29 kyun likh diya
...Yes!! par galti se tmne sahi answer dia 😛 chillax
@anytomdickandhary said:
Thanks for complement mate.On a lighter note: Q: aap kaise soch lete ho is tarah..???Ans: I dont know"thoda hmein bhi bataein.."Ans: Sir, last 8 years se PG pe share kar raha hun jitna mujhe aata hai.ATDH.
are sir aap "sir" na bolo mujhe..abhi deserve nai karta hu...honestly...but seriously..hats off to ur thinking.......app kamaal hain..
@anytomdickandhary said:

"thoda hmein bhi bataein.."Ans: Sir, last 8 years se PG pe share kar raha hun jitna mujhe aata hai.ATDH.
aur sir jii hum apse sikhte aa rahe hai


Sohan and Rohan cut a regular hexagon and regular octagon out of circular papers of radius 20 each.
find difference between perimeters of hexagon and octagon

1.6
2.4
2
2.6


@gautam22 said:
arey han sir mera to 31 aa raha hai maine 29 kyun likh diya
exactly mera bhi yahi point hai...kya ye case dependent ques hai??

@gautam22 said:
par fir ye case bhi to hai fir ans 29 kyun hai
Are tmara total shayad 58 ara hai just check!!!
Edit: Your total is >56 which is the mistake you did