Some1 pls put ol d CL proc mocks of dis year in the dropbox...
guys I m planing to cover CAT last year papers in next 3-5 days, cud u pls let me knw kaun se year se strt karu...shal I strt from 1990 or last 4-5 yrs will b fyn...?
PS: Itna sannata kyu h iss thread??
do 99-03 first and den move on to oders
A bookstore has a bookshelf with books arranged in such a manner that the book placed at the centre is the most expensive. From one end of the shelf, the prices of the books increase by Rs. 10 till the central book, and from the other end of the shelf, the prices of the books increase by Rs. 20 till the central book. Prices(in Rs.) of all books are integers.
Q1. If the total price of all the books is Rs. 3660, then which of the following can be the total number of books on the shelf?
1. 7
2. 15
3. 11
4. 21
Q2. If there are 21 books in all on the shelf then which of the following cannot be the the total price of all the books on the shelf?
1. Rs. 13050
2. Rs. 14100
3. Rs. 17250
4. Rs. 19200
Mocks and sectionals this week.
For some reason I did more verbal than quant this week and it had a really interesting effect. :P
CL VALR sectional 5 = 29A 22C 7W = 59.
CL VALR sectional 3 = 24A 20C 4W = 56
1305: 98.32 = 98.55 + 91.99
Last year SIM7 VALR section = 22A 13C 9W = 30.
SIM8: 96.9 = 98.5 + 87.0
No prizes for spotting the trend.
@Omkarp said: A bookstore has a bookshelf with books arranged in such a manner that the book placed at the centre is the most expensive. From one end of the shelf, the prices of the books increase by Rs. 10 till the central book, and from the other end of the shelf, the prices of the books increase by Rs. 20 till the central book. Prices(in Rs.) of all books are integers.Q1. If the total price of all the books is Rs. 3660, then which of the following can be the total number of books on the shelf?1. 7 2. 15 3. 11 4. 21Q2. If there are 21 books in all on the shelf then which of the following cannot be the the total price of all the books on the shelf?1. Rs. 13050 2. Rs. 14100 3. Rs. 17250 4. Rs. 19200
1)15
2)19200
??
@Omkarp said: A bookstore has a bookshelf with books arranged in such a manner that the book placed at the centre is the most expensive. From one end of the shelf, the prices of the books increase by Rs. 10 till the central book, and from the other end of the shelf, the prices of the books increase by Rs. 20.
Let the price of the Centre book be P and let total no. of books be (n+1).
1.)
=> (P - 10*n/2) + ... + (P -10) + P + (P-20) + (P-40) + ... + (P-20*n/2) = 3660
=> (n+1)P - 10*(1+2+3+..+n/2) - 20*(1+2+3+...+n/2) = 3660
=> (n+1)P - 30*(1+2+3+...+n/2) = 3660.
=> (n+1)P - 30*(n/4)*(n+2/2) = 3660
Thus, P = 3660/(n+1) + [15*n*(n+2)/4]/(n+1)
Now, as n+2, n+1 and n are consecutive integers and so for 2nd term of RHS to be an integer, (n+1) should be of the form 15k.
Thus, Total Books = (n+1) = 15.
2.) Putting n = 21 in above equation, we have:
=> 21P - 30*(10*11/2) = 21P - 1650
Let 21P - 1650 = X.
Now, P = X/21 + 1650/21.
What I sometimes do is find out 1650 mod 21 = 12.
So, X mod 21 should be 9 to give an integer P.
Thus, 19200 is not possible.
Bahut soo liye sab karo ek bhadia question from the online version of CAT..
(a-c-b)^2005
Find the number of positive terms in the xpansion
A) (2007C2 - 1)/2
B) (2007C2+1)/2
C) (1003)^2
D) (1003)^2 + 1003
Choose the grammatically correct sentence as ur option
A) She recommended that John should take the ferry.
B) She recommended that John takes the ferry.
C) She recommended that John had taken the ferry.
D) She recommended that John take the ferry.
@nits2811 said: Bahut soo liye sab karo ek bhadia question from the online version of CAT..(a-c-b)^2005Find the number of positive terms in the xpansionA) (2007C2 - 1)/2B) (2007C2+1)/2C) (1003)^2D) (1003)^2 + 1003
1003^2?
@nits2811 said: Choose the grammatically correct sentence as ur optionA) She recommended that John should take the ferry.B) She recommended that John takes the ferry.C) She recommended that John had taken the ferry.D) She recommended that John take the ferry.
D..gut feel hai koi reason nahi hai mere paas...SC me jo padhne me accha lagta hai bas wahi mark karta hun......A se thoda doubt hai par D :P
@anupam001 said:D..gut feel hai koi reason nahi hai mere paas...SC me jo padhne me accha lagta hai bas wahi mark karta hun......A se thoda doubt hai par D
ek baar aur soch lo..CAT yeh mauka nhi dega lekin main de rha huun...
@allan89 said: @nits2811 @anupam001 - u guys are not posting ur QA sectional scores and MC's anymore?
haven't taken any..will give this weekend fir post karunga
@allan89 said: @nits2811 @anupam001 - u guys are not posting ur QA sectional scores and MC's anymore?
bhai main de hi nhi rha...its time for some rectification here..revising few basic stuff and practising questions...so is hafte wahi chal rha h...next week se...i wld b bak in full swing wid mocks and sectionals...
@nits2811 said:bhai main de hi nhi rha...its time for some rectification here..revising few basic stuff and practising questions...so is hafte wahi chal rha h...next week se...i wld b bak in full swing wid mocks and sectionals...
cat me RC me poem aane ka koi chance hai kya ?
@anupam001 said:cat me RC me poem aane ka koi chance hai kya ?
most probably next to zero..!!
aagar aaya toh main toh CAT waalo ko chodunga nahi...
@nits2811 said:most probably next to zero..!!aagar aaya toh main toh CAT waalo ko chodunga nahi...
Bhai aa gya to CAT wale hume kahi ka nhi chodenge....