Official Quant thread for CAT 2013

Find the Number of Numbers That can be formed using all the digitds 1,2,3,4,3,2,1. only once.

so that the odd digits occupy all the odd spaces only. ??


Of the total income, Tejas uses 60% as expenses and 72% of the remaining as investments. If he still saves Rs. 1680 find the income?
A) 10000
B) 12000
C) 13000
D) 13500
E) 15000

A man takes 18 hours to go by a train to a certain city and return by a car. He loses 4 hours if he goes both ways by train. How long would he have taken if he had travelled by car both ways.

options:(hours)
1) 22
2)18
3)16
4)14
*On solving it , I'm getting 22 hours, but that is not the correct option. Please explain if i am doing it wrong.

ABC.... till K are 11 points spaced on circumference of a circle in that order.what is the sum of all the corner angles of the star formed by joining the points EIBFJCGKDHA in that order ?

Directions for question : Answer the questions on the basis of the information given below.

Choose 1 if the question can be answered by one of the statements alone but not by the other.

Choose 2 if the question can be answered by using either statement alone.

Choose 3 if the question can be answered by using both the statements together, but cannot be

answered by using either statement alone.

Choose 4 if the question cannot be answered even by using both the statements together.

Q. Find the number of girls in class X?

I: The number of ways of selecting 3 girls is same as the number of ways of selecting 15 girls

II: The number of ways of selecting 8 girls of this class is 816

(A) 1

(B) 2

(C) 3

(D) 4

If y=x/4x^2+15x+9 what is the greatest value of Y.


1/27
1/28
2/55
1/30

Please explain your answer as wel

The number of positive integral solutions of :
x1 + x2 + x3 + x4 = 20

(where x1>x2)
Answer:(444)

EXPLANATION REQUIRED !

4 black, 4 white ,2 white 2 black in 3 boxes which are opaque.......

find minimum nuber of attempt to exactly determine balls in 3 boxes........by picking one ball at a time


Consider a cylinder of height h cm and radius r=2/pi cm as shown in fig.A string of a certain length ,when wound on its cylindrical surface,starting at point A and ending at point B ,gives a maximum of n turns ( in other words , the string's length is the minimum length required to wind n turns )

Q) What is the vertical spacing in cm between two consecutive turns ?

(a)h/n (b)h/root(n) (c)h/n^2 (d) cannot be determined

Q2) The same string ,when wounded on the four exterior four walls of a cube of side n cm ,starting at point C and ending at point D ,can give exactly one turn ( as shown in second fig) .The length of the string ,in cm is?

(a) root(2) n (b)root(17)n (c)n (d)root(13) n

Q3)In the setup of the previous questions ,how is h related to n?

(a)h=root(2)n (b)h=root(17) n (c)h=n (d)h = root(13)n


please post an elaborate solution ...

How can the number 65 be expressed as the sum of two or more consecutive integers?



Is (111111111..............91 times) a prime no.??


Aham...find the highest power of 4 in 50 !
-@A

Larger : 5^7 or 7^5
-@A

Find the reminder bhen 7^84 dibhided by 342
-@A

@AshuIIMA

Find the reminder bhen 7^84 dibhided by 342-@A



Answer is 1.


The greatest possible number of points of intersection of 8 straight lines and as circles is?

A) 32
B) 64
C) 76
D) 104

N has f factors, 2N has 2f factors, 6N has 4f factors, 15N has 8f factors. How many factors 30N has?

How many integral solution are possible for|x|+|y|+|z|=10.

  • 402
  • 304
  • 202
  • 502

0 voters

What is the remainder when (1!)^3 + (2!)^3 +(3!)^3+..........+(1152!)^3 is divided by 1152?

  • 125
  • 225
  • 205
  • 325

0 voters

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