Official Quant thread for CAT 2013

Last Sunday, every customer who visited the CENTRAL MALL was given a gift coupon, on every purchase worth Rs. 1000, with a unique six-digit code written on it. Each code was such that-

i). The first digit was non-zero.

ii). All the six digits were distinct.

iii). The 1st and the 6th digits added up to 9 and so do the 2 nd and 5 th digits, and also the 3rd and 4th digits.

A gift was given to a customer who had two coupons with codes such that the numbers formed using the first three digits of each code were the reverse of each other. The number of coupons distributed could not have been more than

A)504

B)729

C)432

D)648

can anyone tell me what is an equivalence relation?in aimcat 1408 Q 29 is about equivalence relation but i am nt able to get what it is..



guys any formulae for how many injective functions exist from set a to set b???tjis is my weakest area

😠😠

a student has taken 10 courses, earning grades A(worth 4 points each), B(worth 3 points each) and C(worth 2 points each). her grade point average is 3.2, and if the course in which she get C were deleted, her gpa in the remaining courses would be 3.333. how many A's, B's and C's did she get?

A. 3,1,6
B. 1,3,6
C. 3,6,1
D. 1,6,3

if the three altitudes in a triangle are 8 cm, 15 cm and 17 cm.which of the following could be the inradius of the triangle?

a) 9 cm

b) 16 cm

c) 4 cm

d) none of these

Three classes X, Y and Z take an algebra test.

The average score in class X is 83.

The average score in class Y is 76.

The average score in class Z is 85.

The average score of all students in classes X and Y together is 79.

The average score of all students in classes Y and Z together is 81.

What is the average for all the three classes?

I dont have OA..Plz share the approach


a)81

b)81.5

c)82

d)84.5

If length sides of tangential quad are a,b,c,d .....

then,1) area of quad = rt(abcd)

2) area of incribed circle = rt(abcd)

which of the following is true?

No of ways to represent 1000 as a sum of consecutive integers are ?

3,6,7, 12

There is a deck of 52 cards.One of them gets lost.From the remaining deck, a card is drawn and it turns out to be a spade.find the probability that the lost card was a spade.

i don't hv the options/answer.kisi aptitude test ka yaad question!

4 professors meet at a get together. If there are a total of 43 hand shakes. Which of the following is true?

a)Each prof. shook hands atleast 21 times

b)each prof. shook hands at the most 21 times

c)At most 2 prof. shook hands 22 times or more

d)at least one prof. shook hands 22 times.

Please explain the approach!

A bag contains 6 red balls, 8 blue balls and 5 white balls. When two balls are drawn at random from this bag what is the probability that the 1)two balls are of the same color 2) Are of different colors

What is the minimum value of x^2+8x-10


If f(x)= 2^x-2^-2 then the value of 2f(x)- 5f(x-1)+2f(x-2) is



Is log 0.1 to the base 10 = -1 can anybody please confirm this ? And would be glad if the logic can also be explained thanks

A person has just sufficient money to buy either 30 guavas, 50 plums or 70 peaches. He spends 20% of the money on travelling, and buys 14 peaches, 'x' guavas and 'y' plums using rest of the money. If x, y>0, what is the minimum value of the sum of x and y?
a. 20
b. 22
c. 24
d. 26

N is a 12 digit number. S (N) denotes the sum of its digits. If 1000000000000 = N + S(N) and the sum of the last two digits of N is 15, find its units digit.

9

8

7

6 --ans.

pls explain..


@cristianokaka
card wala sum ka solution ... 😛

A includes all no such that 100

Please explain the approach. Thanks!

Guys can anyone help me with this..


I need FREE online CHAPTER WISE practice tests for quant.. can anyone refer a particular site providing with free chapter wise tests in quant.??

Thank you 😃