Official Quant thread for CAT 2013

@saurav205 said:
0 aayega,....pattern repeats after every 6 numbers....also 1000/1001 gives R as -1so 10^6 /1001 will give R of +1so triplets alternate +1 and -1..100 triplets....so sum will be 0...hence divisible....
bro isko ek simple method se yaad karlo.. if you multiply any three digit number xyz by 1001 you would get xyzxyz.. so if the no of digits given is multiple of 6 then it is completely divisible by 1001 provided the six digits are of the form xyzxyz
@viewpt said:
Q: 37^37^41^43^53 div by 67find R?Gd Night
Ye mere ko CAT 2050 ka question lag raha hai

http://www.pagalguy.com/news/divide-and-conquer-3-simple-rules-find-out-divisibility-numbers-a-16684
@scrabbler said:
108?Either three serials liked by 2 (NT, NR and TR) and the 4th liked by only 1 person (in which case the person liking the 4th can be chosen in 3 ways (N or T or R) and the likes
Ye songs ka kya khel hai?
@albiesriram said:
NIna , Teena, Reena watch 4 kinds of serials. No serial is liked by all the three gals. Furthermore,for each of the three pairs of gals, there is at least one song liked by those two gals and disliked by the third. In how many ways it is possible? Options:108,132,671,846,1105.
3c1*(4! + 4!/2) = 108??

not sure though #PnC
@iLoveTorres said:
bro isko ek simple method se yaad karlo.. if you multiply any three digit number xyz by 1001 you would get xyzxyz.. so if the no of digits given is multiple of 6 then it is completely divisible by 1001 provided the six digits are of the form xyzxyz
if you see carefully pahle yehi kiya hai... I have mentioned that the pattern repeats after every 6...
baad mein also kar ke doosra method explain kiya hai...
@Logrhythm said:
37^37^41^43^53%67 --- (A) e(67) = 6637^41^43^53%66 --- (B)e(66) = 2041^43^53%20 = 1put in (B)37^1%66 = 37put in (A)37^37%67 = 37*(37^2)^18%67 = 37*(29^2)^9%67 = 37^2(37^2)^4%67 = 29*(29^2)^2%67 = 37...
@amresh_maverick ye check karo...itna bhi CAT 2050 nahi hai i guess
@viewpt said:
Q: 37^37^41^43^53 div by 67find R?Gd Night
6?
@scrabbler said:
108?Either three serials liked by 2 (NT, NR and TR) and the 4th liked by only 1 person (in which case the person liking the 4th can be chosen in 3 ways (N or T or R) and the likes can be arranged among the serials i 4! ways giving 72 waysOr the 4th serial is also liked by one of the above combos NT, NR or TR. In which case the combo which is doubled can be chosen in 3 ways and then the combos can be arranged among the serials in 4!/2! = 12 ways giving 36 ways.I am assuming we needn't consider a case where a serial is watched by no-one!Total 72 + 36 = 108.regardsscrabbler
serial and songs are the same kya??

OA is 132, After considering The conditions where in no one watches the serial. 36+96 =132.

Hey I am attaching a DI question in here.Kindly solve with detailed solutions.Thanks!!

@Dexian said:
serial and songs are the same kya??
Assumed so else question makes no sense . Someone probably copy-pasted and changed variables and forgot to change all...koi ghatiya software engineer hoga....hum bhi yehi karte the CFD assignments mein...:)

regards
scrabbler

@ScareCrow28 said:
Ye songs ka kya khel hai?
@pathetic said:
Hey I am attaching a DI question in here.Kindly solve with detailed solutions.Thanks!!
Firstly, the pictures in your Doc are not clearly visible...(kind of pathetic) haha jk

secondly, you can post all your LrDi ques here --> http://www.pagalguy.com/forums/quantitative-ability-and-di/official-lr-di-thread-c-t-91028/p-3617216/r-4743520?page=1
@albiesriram said:
OA is 132, After considering The conditions where in no one watches the serial. 36+96 =132.
Can't accept that as the question says "NIna , Teena, Reena watch 4 kinds of serials" So considering a case where 1 serial is not watched at all makes no sense as it contradicts the question. :(

regards
scrabbler

@ScareCrow28 said:
Zoom karo it's okay if he has posted DI ka man ni kara though
woh toh kabhi nahi kar raha hota...DI is too intimidating... lethargy dons as DI comes into the picture...
@pathetic said:
Hey I am attaching a DI question in here.Kindly solve with detailed solutions.Thanks!!
13) 620
14)700
15)1340
@scrabbler said:
Assumed so else question makes no sense . Someone probably copy-pasted and changed variables and forgot to change all...koi ghatiya software engineer hoga....hum bhi yehi karte the CFD assignments mein...regardsscrabbler
ahem. But no S/w.
@abhishek.2011 said:
i banged my head yesterday 2 times just because of this question now will post 2 approaches, all the options are wrong herex+y+z=30let y and z be greater than 3x+(4+a)+(4+b)=30here y= 4+a and z = 4+b as a and b can be 0,1..... so y and z will always be greater than 3x+a+b=22solutions = 24c2now these 24c2 solutions will include cases in which x is anything from 0 to 22let x .y ,z all be greater than 3(4+a) + (4+b) +(4+c)=30a+b+c=18 solutions 20c2now 24c2 - 20c2 will include all the numbers having x less than or equal to 3 and y and z greater than or equal to 4let x be 0 y and z can be equal here (15,15) so -1caselet x be 2 y and z can again be equal here (14,14) so -1 casetotal favourable cases24c2- 20c2 -2 =84now this i did for x similarly y and z can also be takenso 84*3c1=252prove me wrong if u can
good approach bhai but i am no one to prove right or wrong anything
@pathetic said:
Hey I am attaching a DI question in here.Kindly solve with detailed solutions.Thanks!!
13) 620
14)700
15)1340

plzz OA batan............
@scrabbler said:
Can't accept that as the question says "NIna , Teena, Reena watch 4 kinds of serials" So considering a case where 1 serial is not watched at all makes no sense as it contradicts the question. regardsscrabbler
ya. I understand. 108 should be the answer..