@DEBJITNAG All the best bro..do well
some1 pls xplain dis...
@CBZ123 said:@bemad93?
its 105...but 93 was also n option...i was getting some very weird...pls xplain d approach...
@bemad said:some1 pls xplain dis...
The number must has 14 digits.
3, followed by 13 zeros =1 way
2, followed by one 1, and 12 0s = 13 ways
1, followed by two 1s and and 11 zeros= 13!/2!*11!=78
1, followed by one 2 rest zeros=13 ways.
Hence 105 ways
OOPS..calc error..
As n>10^13
we can have 100...(11 times)..11as smallest number-->78 ways(13!/11!2!)
next 200...12times..1-->13!/12!-->13*2-->26 *2 cos 1 and 2 can interchange
next 300...13times only 1
hence
78+26+1=105
@Love_CAT said:The number must has 14 digits.3, followed by 13 zeros =1 way2, followed by one 1, and 12 0s = 13 ways1, followed by two 1s and and 11 zeros= 13!/2!*11!=781, followed by one 2 rest zeros=13 ways.Hence 105 ways
@CBZ123 said:OOPS..calc error..As n>10^13we can have 100...(11 times)..11as smallest number-->78 ways(13!/11!2!)next 200...12times..1-->13!/12!-->13*2-->26 *2 cos 1 and 2 can interchangenext 300...13times only 1hence78+26+1=105
but shudnt it be ol d numbers of the form 9x+3 btwn 10^13 and 10^14....in dat case dere wud be many numbers...no?
11111111100003 is of the form 9x+3 but sum of d digits isn't 3..
point is just to get the some of digits as 3
@bemad said:but shudnt it be ol d numbers of the form 9x+3 btwn 10^13 and 10^14....in dat case dere wud be many numbers...no?
bhai woh digital sum hai, sum of the digits nehi.
like SOD of 146 is 11 and digital sum is 2
@CBZ123 said:11111111100003 is of the form 9x+3 but sum of d digits isn't 3..point is just to get the some of digits as 3
@Love_CAT said:bhai woh digital sum hai, sum of the digits.like SOD of 146 is 11 and digital sum is 2
ok...thanks....sum of digit nd digit sum me b fark hota h pata nhi tha....
@DEBJITNAG said:CAT experience:Thanks everyone for your wish
bhai kisi particular topic pe focus jyada karre kya?
nd shud v do time ka sectional advanced nd odr tough qs as v ol r gtng to knw dat d ppr is tuf....?
ny TIPS?
one of the maulers of this year from UDT... bats tomorrow...
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ATB @Omkarp ...
you know what you have to do ;)
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Best of Luck @Omkarp .
Bhai, kal dhang se pel ke aana with a relaxed mind. You know what it will be, how you have to go through. Buss tough paper ho bhi toh don't lose. Just keep it going :)
