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official quant thread for CAT 2009
Quantitative Questions and Answers Discuss Quantitative and other Math related questions. Post your math doubts and get it solved by the smartest brains this side of the universe !

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prateek7563 prateek7563 is offline
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Re: official quant thread for CAT 2009 - 11-07-2009, 04:10 PM

Quote:
Originally Posted by capriccio View Post
hey puys plz help me out at solving this type of questions..

A watch was running 14 mins late at 6.00 a.m on a saturday.exactly one week later, it was running 28 minutes fast.if the clock gained time uniformly,then what was the actual time when the clock showed 6.07 pm on tuesday?

Plz anyone explain the approach in detail..
wait i misread the question, IS IT 6:00 PM

Last edited by prateek7563; 11-07-2009 at 04:17 PM.
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Re: official quant thread for CAT 2009 - 11-07-2009, 04:15 PM

Quote:
Originally Posted by capriccio View Post
hey puys plz help me out at solving this type of questions..

a watch was running 14 mins late at 6.00 a.m on a saturday.Exactly one week later, it was running 28 minutes fast.If the clock gained time uniformly,then what was the actual time when the clock showed 6.07 pm on tuesday?

plz anyone explain the approach in detail..
Gained 14+28= 42 Minutes in 7*24=168 hours So time gained in 84 Hours=21 Minutes Time lagging m=14 minutes hence has gained 7 Minutes Actual time is 6 p.m. Correct me if i am wrong


//-] bhay Srivastava
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Re: official quant thread for CAT 2009 - 11-07-2009, 04:20 PM

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Originally Posted by abhay15783 View Post
Gained 14+28= 42 Minutes in 7*24=168 hours So time gained in 84 Hours=21 Minutes Time lagging m=14 minutes hence has gained 7 Minutes Actual time is 6 p.m. Correct me if i am wrong
abhay i dont have the OA with me..but ur logic seems correct..thanx bro..
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Re: official quant thread for CAT 2009 - 11-07-2009, 04:25 PM

solve this..
the units digit of 1^1! + 2^2!+ 3^3!+.....81^81! is ?

i dont have the OA..but m gettin it 1..plz check if m correct?
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Re: official quant thread for CAT 2009 - 11-07-2009, 04:26 PM

See,
clock gains 6 min a day. By tuesday morning 600am it will gain 18 min.


Hence , at 600 am in tue it shows 6:04 am.

Also clock gains 3 min in 12 hours.

Hence when original time is 6 pm , clock shows 6:08 pm . Hence answer shuld be 559pm.
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Re: official quant thread for CAT 2009 - 11-07-2009, 04:32 PM

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Originally Posted by prateek7563 View Post
See,
clock gains 6 min a day. By tuesday morning 600am it will gain 18 min.


Hence , at 600 am in tue it shows 6:04 am.

Also clock gains 3 min in 12 hours.

Hence when original time is 6 pm , clock shows 6:08 pm
. Hence answer shuld be 559pm.
bro..if the clock gains 3 mins in 12 hrs ..at 6 pm it will show 6.07 pm and when the actual time shud be 6 pm..so i think it shud b the answer..correct me if m wrong..
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Re: official quant thread for CAT 2009 - 11-07-2009, 04:38 PM

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Originally Posted by capriccio View Post
bro..if the clock gains 3 mins in 12 hrs ..at 6 pm it will show 6.07 pm and when the actual time shud be 6 pm..so i think it shud b the answer..correct me if m wrong..
oh man i added the 604 and 3 minutes wrongly, thnx for letting me know.

Anyways answer is 600pm
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Re: official quant thread for CAT 2009 - 11-07-2009, 04:38 PM

answer the questions on the basis of the info given below..
A set c is defined such that c=(z-2,z-1,z,z+1,z+2) and z is an integer.

for z=72 to 136,how many of the sets will always contain a multiple of 9?
a.24 b.23 c.32 d.8 e.7

for z=11 to 99,how many sets will contain atleast one perfect square?

a.19 b.21 c.18 d.6 e.none of these

plz give a detail solution..
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prateek7563 prateek7563 is offline
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Re: official quant thread for CAT 2009 - 11-07-2009, 04:45 PM

Quote:
Originally Posted by capriccio View Post
answer the questions on the basis of the info given below..
A set c is defined such that c=(z-2,z-1,z,z+1,z+2) and z is an integer.

For z=72 to 136,how many of the sets will always contain a multiple of 9?
A.24 b.23 c.32 d.8 e.7

for z=11 to 99,how many sets will contain atleast one perfect square?

A.19 b.21 c.18 d.6 e.none of these

plz give a detail solution..
for :

1. Answer is 32.

2. None
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Re: official quant thread for CAT 2009 - 11-07-2009, 04:49 PM

Quote:
Originally Posted by prateek7563 View Post
for :

1. Answer is 32.

2. None
sorry bro..both ae incorrect..the correct answer is

1.23
2.19
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