Official Quant thread for CAT 2013

MBA CAT 2024
15023
@ravi.theja said:
There were 60 questions in an exam. If 1 mark was awarded for every correct answer and 1/3rd mark was deducted for every wrong answer, how many different net scores were possible in the exam?
238??

total no. of marks possible=180-60+1=241
no. of marks not possible=3*2/2=3
So possible=241-3=238
15024
@ravi.theja 0?
15025
@ravi.theja said:
There were 60 questions in an exam. If 1 mark was awarded for every correct answer and 1/3rd mark was deducted for every wrong answer, how many different net scores were possible in the exam?
Is it 238??
i wld take +3 and -1 wala scenario (it is one and the same thing)
range -> -60 to 180 => 241
but out of these 3*2/3 = 3 scores are not possible....
hence, total possible scores = 241-3 = 238 scores
15026
@Amrofa said:
1^2+2^2+3^2+4^2...........+10^2 + 1^2+2^2+3^2+............+9^2-> 670
@shattereddream said:
Sum of first two digits = 0 ....... 1 CaseSum of first two digits = 1 ....... 2 Case..Sum of first two digits = 10 ...... 9 CaseSum of first two digits = 11 ...... 8 Case..Sum of first two digits = 18 ...... 1 CaseSo Total will be = 2(1^2 + 2^2 + .... + 9^2) + 10^2 = 670
OA=670........

Two trains C and B, start at same time from station A and B resp. towards each other. After passing each other, they take 12 hours and 3 hours to reach B and A respectively. If the train C is moving at the speed of 48kmph, the speed of train B is??
15027
@ravi.theja said:
P, Q and R are in arithmetic progression but not in geometric progression. Their squares are in harmonic progression. 2Q2 + PR equal ??
3PR??

@bs0409 said:OA=670........Two trains C and B, start at same time from station A and B resp. towards each other. After passing each other, they take 12 hours and 3 hours to reach B and A respectively. If the train C is moving at the speed of 48kmph, the speed of train B is??

Speed of C/Speed of B =Root of(time taken by B/time taken by C)

Substituting values we get speed of B as 96 kmph
15028
@bs0409 how do you calculate the number of marks not possible?
15029
@techgeek2050 said:
@bs0409 how do you calculate the number of marks not possible?
If there are n marks given for a correct answer and 1 mark deducted for an incorrect answer, then no. of marks not possible is n(n-1)/2.
15030
@pirateiim478 Do you know what happened to guys like Varun tyagi,jain4444,Vikrambatra,Jaikishann,Culdip,Vikasneur..........
15031
@bs0409 said:
OA=670........Two trains C and B, start at same time from station A and B resp. towards each other. After passing each other, they take 12 hours and 3 hours to reach B and A respectively. If the train C is moving at the speed of 48kmph, the speed of train B is??
96km/hr?
Sc/Sb=rt(Tb/Tc)
48/x=rt(3/12)
x=96
15032
@bs0409 said:
@pirateiim478 Do you know what happened to guys like Varun tyagi,jain4444,Vikrambatra,Jaikishann,Culdip,Vikasneur..........
@varun.tyagi Varun Saar is up with his GMAT Application Process. :mg:

@jain4444 - Jain underground since CAT Results. :|

Vikram Batra Bhai aate hi nahin. :splat:

@culdip Bhai se khud puch lete hain. :)

@vikasneuer Bhai - Kidhar ?

@jaikishan.n ??
15033
@bs0409 said:
OA=670........Two trains C and B, start at same time from station A and B resp. towards each other. After passing each other, they take 12 hours and 3 hours to reach B and A respectively. If the train C is moving at the speed of 48kmph, the speed of train B is??
48*18 / 9 => 96 kmph ?
15034
@bs0409 said:
238??total no. of marks possible=180-60+1=241no. of marks not possible=3*2/2=3So possible=241-3=238
1 marks awarded per question na ? then how come you got 180 ?
15035
@bs0409 said:
OA=670........Two trains C and B, start at same time from station A and B resp. towards each other. After passing each other, they take 12 hours and 3 hours to reach B and A respectively. If the train C is moving at the speed of 48kmph, the speed of train B is??
96 kmph
15036
@gs4890 said:
1 marks awarded per question na ? then how come you got 180 ?
bhai he took 3 for correct and -1 for wrong which is equal to 1 for correct and -1/3 for wrong..same ratio...
15037
@Estallar12 said:
@varun.tyagi Varun Saar is up with his GMAT Application Process. @jain4444 - Jain underground since CAT Results. Vikram Batra Bhai aate hi nahin. @culdip Bhai se khud puch lete hain. @vikasneuer Bhai - Kidhar ? @jaikishan.n ??
SPAM ALERT!

IIMK 2013-15 thread par hoon. Bahut curious hai ye aane wala batch. Stage 1 shortlist ayi nahi ki stage 2 ki tension ho gayi 😃
It's good to see the enthusiasm waise.
How're things here?
15038

let after time t they meet

let speed of b is v km/hr
48t/v=3 vt/48=12
divide both v^2=96*96
so v=96km/hr
15039

when 3179^4241 divided by 4, d Remainder ?

15040
@Cat.Aspirant123 said:
when 3179^4241 divided by 4, d Remainder ?
3?
15041
@Cat.Aspirant123 said:
when 3179^4241 divided by 4, d Remainder ?
3179^4241 / 4 = 3 ^ 4241 /4 = (-1)^4241 /4 = -1/4
R = 3
15042
@Cat.Aspirant123
3