Official Quant thread for CAT 2013

saurav205 · February 18, 2013, 4:36pm

@mohitjain said:
area=1/2mod(x1(y2-y3)+x2(y3-y1)+x3(y1-y2)aftr dis we get d equation as 2p^2+p=36and solving dis we get p=4

arey bhai this formula comes out from the matrix...

Try it out..use the matrix to solve w/o taking the values..as in take it like x1, x2,x3 and y1,y2 and y3...

You will see this is exactly what you get...

mohitjain · February 18, 2013, 4:37pm

@saurav205 said:
arey bhai this formula comes out from the matrix...Try it out..use the matrix to solve w/o taking the values..as in take it like x1, x2,x3 and y1,y2 and y3...You will see this is exactly what you get...

kk mate..u gt d equation?? simple error ho raha hoga kahin pe

imtihaan · February 18, 2013, 4:38pm

@nole take the side as perpendicular which is oppiste to the angle ...suppose u r calculating sin a then side opposite to angl a will be prpendicular and the rest one is hyp.

saurav205 · February 18, 2013, 4:39pm

@mohitjain said:
kk mate..u gt d equation?? simple error ho raha hoga kahin pe

silly me...

catahead · February 18, 2013, 4:39pm

How many times in a day are the two hands of a clock opposide to each other in a line?

the_loser · February 18, 2013, 4:39pm

Some logarithm .If log (a/b) + log(a/b) = log (a+b)
find the value of a^2 - b^2 = ?

tmohan02 · February 18, 2013, 4:40pm

Q) There are two numbers such that, if both of them are individually increased by 5 and then by the same percentage as they were increased in the first instance, each would result in 36. Find the difference between the two number?

Options:-

a) 23

b) 22

c) 20

d) 24

subhashdec2 · February 18, 2013, 4:49pm

@tmohan02 said:

Q) There are two numbers such that, if both of them are individually increased by 5 and then by the same percentage as they were increased in the first instance, each would result in 36. Find the difference between the two number?

Options:-

a) 23

b) 22

c) 20

d) 24

X+5 + 5(X+5)/X=36

(X+5)(1+5/X) =36

(X+5)^2=36X

X^2-26X+25=0

X=25,1

24??

subhashdec2 · February 18, 2013, 4:51pm

@The_Loser said:
Some logarithm .If log (a/b) + log(a/b) = log (a+b)
find the value of a^2 - b^2 = ?

a^2/b^2 = a+b

a^2-b^2 = b^2(a+b-1)

logrhythm · February 18, 2013, 4:53pm

@tmohan02 said:
Q) There are two numbers such that, if both of them are individually increased by 5 and then by the same percentage as they were increased in the first instance, each would result in 36. Find the difference between the two number?Options:- a) 23b) 22c) 20d) 24

(x+5) + {(x+5)*5/x} = 36

x= 25,1

diff = 24...

saurav205 · February 18, 2013, 4:56pm

@tmohan02 said:
Q) There are two numbers such that, if both of them are individually increased by 5 and then by the same percentage as they were increased in the first instance, each would result in 36. Find the difference between the two number?Options:- a) 23b) 22c) 20d) 24

24..

numbers are 1 and 25..

catahead · February 18, 2013, 4:57pm

@tmohan02 said:
Q) There are two numbers such that, if both of them are individually increased by 5 and then by the same percentage as they were increased in the first instance, each would result in 36. Find the difference between the two number?Options:- a) 23b) 22c) 20d) 24

Is it 24?

sam05 · February 18, 2013, 5:03pm

@tmohan02 said:
Q) There are two numbers such that, if both of them are individually increased by 5 and then by the same percentage as they were increased in the first instance, each would result in 36. Find the difference between the two number?Options:- a) 23b) 22c) 20d) 24

24 25 and 1 are the nos

mohitjain · February 18, 2013, 5:07pm

An analysis of 100 personal injury claims made upon a motor insurance company revealed that loss or injury in respect of an eye, an arm and a leg occurred in 30, 50 and 70 cases respectively. Claims involving the loss or injury to exactly two of these members numbered 44. How many claims involved loss or injury to all three? Assume that one or another of the three members was mentioned in each of the 100 claims.

exodia · February 18, 2013, 5:10pm

@Exodia said:
How many integer values of x and y are there such that 4x+3y=3 while mod(x)

OA: 143
@mailtoankit @Logrhythm

exodia · February 18, 2013, 5:13pm

@Exodia said:
Find GCD of (2^100)-1 and (2^120) -1Plz give answer alongwith explanation.

sam05 · February 18, 2013, 5:19pm

@mohitjain said:
An analysis of 100 personal injury claims made upon a motor insurance company revealed that loss or injury in respect of an eye, an arm and a leg occurred in 30, 50 and 70 cases respectively. Claims involving the loss or injury to exactly two of these members numbered 44. How many claims involved loss or injury to all three? Assume that one or another of the three members was mentioned in each of the 100 claims.

3...

I + II + III=100
I + 2II + 3 III=150

II+2III=50
hence III=3

the_loser · February 18, 2013, 5:42pm

log(2a) c = 4, log(5b) c = 12 and log(ab) c = 3/7. Find the value of c.

mailtoankit · February 18, 2013, 5:44pm

@mohitjain said:
An analysis of 100 personal injury claims made upon a motor insurance company revealed that loss or injury in respect of an eye, an arm and a leg occurred in 30, 50 and 70 cases respectively. Claims involving the loss or injury to exactly two of these members numbered 44. How many claims involved loss or injury to all three? Assume that one or another of the three members was mentioned in each of the 100 claims.

I + II + III = 100

I + 2*II + 3*III = 150

150 + II + III - 2*II - 3*III = 100

2*III = 150 - 100 - 44

2*III = 6

III = 3 ?

ilovetorres · February 18, 2013, 5:46pm

@The_Loser said:
log(2a) c = 4, log(5b) c = 12 and log(ab) c = 3/7. Find the value of c.

i dono if this s the answer.. but i have got a weird solution.. is the answer 10^(102/7)?