Official Quant thread for CAT 2013

In Navratra a society of three families (each family has three member a father, a mother & a daughter) wants to worship Goddess Durga. They decided that in a day one person of the society will do Puja. So they divided all nine days among them (9 people) such that within a family mother will do puja after father and daughter will do puja after father and mother. Then how many different way they can do Puja in Naratra.

When a^3 + b^3 + c^3 + d^3 + e^3 is divided by 7, the remainder is 'r'. If a, b, c, d and e are positive integers and none of them is divisible by 7, what is the sum of all the possible values of 'r'?

a) 15

b) 10

c) 5

d) 21

Please share your approach puys

Statements:Some spoons are bowls. All bowls are knives. All knives are forks. Conclusions: I. All spoons are forks. II. All bowls are forks. III. Some knives are bowls. IV. Some forks are spoons.

1) None of these

2) Only III and IV follow

3) All follow

4) Only II and IV follow

5) Only II and III follow

from where i can get the notes on TSD , PnC and Probability
plz help guys from basic to standard concepts ....

A square floor is fully covered with square tiles of identical size. The tiles along the edges are red and the tiles in the interior are black. The number of black tiles is 9/7 times the number of red tiles on the floor. Find the number of tiles along any edge of the floor.


  • 12
  • 28
  • 4
  • 8

0 voters

(x-2a)(x-a)(x-5a)(x-11a) + ka^4 .... what is the min value of k which will make this expression a perfect square ??

can any one throw some light on the problems involving f(f(f(x)))...how to approach such problems...

pls solve the problem

f(x) a function with domain 0

f(x)=2x if 0

f(x)=-2x+2 if 1/2

find the area between the curve y=f(f(f(x))) and the coordinate axes.

with solution pls

A set of consecutive positive integers beginning with 1 is written on the blackboard. A student came

along and erased one number. The average of the remaining numbers is 602/17

what was the

number erased?a. 7 b. 8 c. 9 d. None of these

ANY OTHER METHOD THEN HIT AND TRAIL???


AB=9C+1, where A,B,C are natural numbers and 100

In how many ways can 5 people sit around a circular table such that one does not have the same neighbors in any two arrangements?

A cocktail has to be prepared from 3 kinds of whisky, 4 kinds of soda, 5 kinds of fruit juice. How many cocktails can be made taking atleast one of each kind?

How to Solve Truth tellor, Alternator( Randomizer), and Liar quesitons ?
Can anyone suggest questions & TIPS to solve these set of questions?

mod x + mod y + mod z+ mod a + mod b +mod c= 10.
find the no. of integral solutions possible

  • 400004
  • 400008
  • 400010
  • 400006

0 voters

A purse contains, in all, 378 coins consisting of one rupee,50 paise and 25 paise. The

total values of these coins are in the ratio of 13:11:7. How many coins of one rupee does

the purse contain?


  • 168
  • 136
  • cannot be determined
  • 126
  • 78

0 voters

Last year ,the prices of tea and coffee were in the ratio of 2:3 . Between last year and

this year, the price of tea has risen in the ratio of 5:6 and that of coffee, in the ratio of 7:8.

If this year, a kg of coffee and a kg of tea together cost Rs 51,how much does a kg of

coffee cost?

  • 30
  • None of these
  • 17.5
  • 21
  • 26.25

0 voters

A property dealer purchases two flats for Rs 60 lakhs. He sells one at a loss of 5% and the other at a gain of 10 %.He loses 10% in the entire transaction. What is the cost of each flat?

  • 20 lakhs , 40 lakhs
  • 12 lakhs, 48 lakhs
  • None of these
  • 8 lakhs , 52 lakhs

0 voters

if n=100000! is divisible by p^p where p is a prime number,what is the maximum value of p?


  • 29
  • none of these
  • 97
  • 101

0 voters

Attempting 16 questions in quant with 14 right will fetch you how much percentile in CAT...guys reply asap..need to assess my preparation..

Any link to coordinate geometry chapter with illustrations will be really helpful. Does any one have e-materials on installments and coordinate geometry??


Two circles have their centres 21 cm apart. The radii of the circles are 10 cm and 17 cm. Find the length (in cm) of the common chord of the two circles.

  • 12
  • 8
  • 6
  • 16

0 voters