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Official Quant Thread for CAT 2012 [part 2]

  • Discussion in CAT
  • Created by @jain4444
*All the quant enthusiasts :: please continue here. here is the link to the previous thread:* http://www.pagalguy.com/forum/quantitative-questions-and-answers/74662-official-quant-thread-cat-2012-a.html
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What is the next no. In below series?
1,11,21,1211,111221,?

1.312211
2.222211
3.311211
4.211211


ans : 3.311211
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I guessed this one would be option five because the answer would be 12+a*sqrt(b) :sneaky:

And only option5, has that form. But is there a better way to do this? Something conceptual?


P.s. Encleadus = Saransh bhai? and Pkaman = faad pankaj kamani?



Yeah ... :-P

And you are THE Omkar Parab ? :)

Continue here :

http://www.pagalguy.com/forum/cat-and-related-discussion/80436-official-quant-thread-cat-2012-a.html#post3383653
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may be coz,i'd found myself understanding the problem:)

but really thanks a lot for your effort..

Another Q from geometry:



OA:5


P.S : Good Night,And Good Luck



I guessed this one would be option 5 because the answer would be 12+a*sqrt(b) :sneaky:
12 because AE + ED = 12, and the other side would be a*sqrt(80)

And only option5, has that form. But is there a better way to do this? Something conceptual?


P.s. Encleadus = Saransh bhai? and Pkaman = faad pankaj kamani?
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312211

OA kya hai ?


Bro aapne ek baar jo bol diya OA wahi hota hai.
Namaskaar pankaj bhai!!
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What is the next no. In below series?
1,11,21,1211,111221,?

1.312211
2.222211
3.311211
4.211211


It is 1. 312211

Concentrate on how the numbers are said,
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What is the next no. In below series?
1,11,21,1211,111221,?

1.312211
2.222211
3.311211
4.211211


This is just counting the number of 1's and 2's.
3 times 1 then 2 times 2 then 1 time 1.
So, 312211.
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What is the next no. In below series?
1,11,21,1211,111221,?

1.312211
2.222211
3.311211
4.211211


312211

OA kya hai ?
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For the M:N wala question it should be 3:2 as explained by arumugudas I think. :grin:
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What is the next no. In below series?
1,11,21,1211,111221,?

1.312211
2.222211
3.311211
4.211211
Commenting on this post has been disabled.
devanshu97 Says
A and B pick up a ball at random from a bag containing M red and N yellow colored balls one after the other replacing the ball everytime till one of them gets red ball. The first one to get a red ball is declared the winner. If A begins the game and odds in favor of his winning the game are 3 to 2, then find the ratio of M:N



i might be wrong ....

i am trying because u asked ........ask jain bhai or varun thaygi ..........

odds in favour = p(E)/p(E') =3/2


its written who gets the red ball will win so winning for A is 3/x and and not winning is 2/x ...here wat is x total no of balls 3 red and 2 yellow ie 5 balls

since the balls are replaced before every draw it remains 5

so M:N =3:2

tell me the ans ...check pls:)
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sumit99 Says
Gr8 move u gt it nice. M on mobile bhai u r absolutely ri8,by the way hw u got that i m on mobile.


may be coz,i'd found myself understanding the problem:)

but really thanks a lot for your effort..

Another Q from geometry:



OA:5


P.S : Good Night,And Good Luck
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sumit99 Says
A father and his son starts at a pt. A wid speeds 12kmph and 18kmph and reach another pt. B. If his son starts 60 min. After his fathet at A and reaches 60 min earlier than his father. Wat is the distance between A and B.


12*(x+2) = 18x

24 = 6x
x=4

D=72
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sumit99 Says
A father and his son starts at a pt. A wid speeds 12kmph and 18kmph and reach another pt. B. If his son starts 60 min. After his fathet at A and reaches 60 min earlier than his father. Wat is the distance between A and B.


the question says father has to travel 2 hrs more than son

diff between their speed is 6 km

so 6*4 = 24 km which will make the father to travel two hrs more


so 18*4 = 72 km
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