Official Quant thread for CAT 2013

MBA CAT 2024
11161
@vbhvgupta said:

a –– If the data in statement (1) alone is sufficient to answer the question;

b –– If the data in statement (2) alone is sufficient to answer the question;

c –– If the data in both the statements together are needed to answer the question;

d –– If either statement (1) alone or statement (2) alone is sufficient to answer the question;

A number is picked randomly from a given set of numbers. What is the probability that it is divisible by 3?

Statement 1: The set contains 10 consecutive integers

Statement 2: The first number of the set is divisible by 3
Option C : both statements required... ?
11162
@floamiya said:
Try 2nd question again
googled and found 40585
:P

these are called factorions...
:)
11163
@adwaitjw here acceleration is given double the v1.can't we use that to shorten the process(instead of using newton'w law) ?
11164
@grkkrg said:
It's not mentioned in the question that they have to be distinct. I may be wrong here though.
ANS is 1
11165
@nole said:
@adwaitjw here acceleration is given double the v1.can't we use that to shorten the process(instead of using newton'w law) ?
Sry forgot to mention... x=2v1 is already used in that newtons law equation to get final simplified equation without x.
i.e. ((240/v1)- 8) = ((120/v1) - 8)^2
Here, already used x=2v1
11166
@karan20 said:
Option C : both statements required... ?
Ans given is A......but I am also getting ans ac C
11167

1. a, b and c are prime numbers. What is the value of a*b* c?
Statement 1:a + b + c = 12
Statement 2:6300 is divisible by a*b* c and 1890 is divisible by b*c

11168
@Bahadur_billa thank you for the advice..!!
11169

Q) for how many integers n, n/(20-n) is the square of an integer??

Options - a) 0 B) 1 C) 2 D) 3 E) 4

11170
@ayushbhalotia said:
Q) for how many integers n, n/(20-n) is the square of an integer??Options - a) 0 B) 1 C) 2 D) 3 E) 4
n=10,16,18

3
11171
@krum said:
n=10,16,183
thanks...even i was getting 3..its a XAT 2007 question and in the solution answer is given as 2, 10 and 16...
11172
@vbhvgupta said:
1. a, b and c are prime numbers. What is the value of a*b* c?Statement 1:a + b + c = 12Statement 2:6300 is divisible by a*b* c and 1890 is divisible by b*c
statement 1 alone ?
11173
A square and rectangle are of equal area. The shorter side of the rectangle is 5m. The perimeter of the square is?
i. Area of rectangle is 25 sq.mt
ii. One side of the rectangle is four times the other
11174
@vbhvgupta said:
A square and rectangle are of equal area. The shorter side of the rectangle is 5m. The perimeter of the square is? i. Area of rectangle is 25 sq.mt ii. One side of the rectangle is four times the other
either statements...
i) perimeter - 20
ii) area = 100, perimeter = 40

:)
11175
@vbhvgupta said:
1. a, b and c are prime numbers. What is the value of a*b* c?
Statement 1:a + b + c = 12
Statement 2:6300 is divisible by a*b* c and 1890 is divisible by b*c
statement 1 alone should be sufficient
11176

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Pls. solve the question .... XAT 2007 Q...

11177
@ayushbhalotia

Kya phela ka 18 aur dusra ka 843 hai??

Approach:

Given, f(1)=3, f(x)*f(y) = f(x+y) + f(x-y)

Now, at x=1, y=0

f(1)*f(0)=f(1)*f(1), or, f(0)=2

And, at x=1,y=1

f(1)*f(1)=f(2) + f(0), or, f(2)=7

Thus, at x=2,y=1

f(2)*f(1)= f(3) + f(1), or, 21 = f(3) + 3, or, f(3)=18..

Again, at x=2, y=2

f(2)*f(2) = f(4) + f(0), or, f(4)= 49 -2, or, f(4)=47

Thus, at x=4, y=3

f(4)*f(3)= f(7) + f(1), or, 47*18 - 3= f(7), or, f(7)= 843..
11178
@ayushbhalotia said:
Q) for how many integers n, n/(20-n) is the square of an integer??Options - a) 0 B) 1 C) 2 D) 3 E) 4
3??
11179
@krum said:
statement 1 alone ?
krum saar....

if the numbers are 2,5,5 or 2,3,7??

no where it is given ki numbers are not equal??
so how to calculate...

"1. a, b and c are prime numbers. What is the value of a*b* c?
Statement 1:a + b + c = 12
Statement 2:6300 is divisible by a*b* c and 1890 is divisible by b*c"
11180
@ayushbhalotia [49]: 18
[50] 843