Search found 411 matches
- Mon Dec 27, 2010 10:42 pm
- Forum: Divisional Math Olympiad
- Topic: DIGIT
- Replies: 24
- Views: 13019
Re: DIGIT
Try site support sub forum for xpert help!!
- Mon Dec 27, 2010 10:40 pm
- Forum: Combinatorics
- Topic: digit problem
- Replies: 8
- Views: 5950
Re: digit problem
Yeah! I saw that last night while spending an hour after thinking about the combi probs I've been working on last week. I also found out that u've become a mastermind of combi probs, bonji!!
- Sun Dec 26, 2010 11:08 pm
- Forum: Combinatorics
- Topic: digit problem
- Replies: 8
- Views: 5950
Re: digit problem
Bonji, Plz give ur sol'n.
Btw I see my prob. my sol'n for the 2nd prob should have been $26^4 \times 22^6$
Is my sol'n also ok??
Btw I see my prob. my sol'n for the 2nd prob should have been $26^4 \times 22^6$
Is my sol'n also ok??
- Sun Dec 26, 2010 10:55 pm
- Forum: Divisional Math Olympiad
- Topic: DIGIT
- Replies: 24
- Views: 13019
Re: DIGIT
Here's my sol'n! :geek: as $1002 \equiv 2 (mod 1000) 1002^{209} \equiv 2^{209} (mod 1000)$ now, let $2^{209} \equiv x (mod 1000) \Rightarrow 2^3\times2^{206} \equiv x( mod 125 \times 2^3) \Rightarrow 2^{206} \equiv \frac x{8} (mod 125)$ we see that, $2^7 \equiv 3 (mod 125) \Rightarrow 2^{203} \equiv...
- Sun Dec 26, 2010 12:11 am
- Forum: Secondary Level
- Topic: Combi probs from Moon vai's note...
- Replies: 13
- Views: 8245
Combi probs from Moon vai's note...
$1)$ How many numbers can we compose using $0,1,...,9$ which are less than $5000$ and are dividable by $5$? $2)$ How many ways can we arrange the word $MATHEMATICS$ such that no two vowels stand together? $3)$ How many ways can we arrange $n$ alphabets(distinct) in a line such that two special alpha...
- Sat Dec 25, 2010 11:38 pm
- Forum: Divisional Math Olympiad
- Topic: DIGIT
- Replies: 24
- Views: 13019
Re: DIGIT
I agree with bonji! I was also thinking about that line!HandaramTheGreat wrote:@shahriar, you can't divide by 2 in the last line cause it isn't coprime with 1000...
my sol'n was according to tushar's hints. I used modulo 125.
- Sat Dec 25, 2010 11:35 pm
- Forum: Combinatorics
- Topic: digit problem
- Replies: 8
- Views: 5950
Re: digit problem
I don't really understand the ques!!
but Here are the sol'ns I made of what I made out of the probs!
$1$) $26^4\times 4^6$
$2$) $22^6\times 4^4$
Please confirm if I'm right??
but Here are the sol'ns I made of what I made out of the probs!
$1$) $26^4\times 4^6$
$2$) $22^6\times 4^4$
Please confirm if I'm right??
- Sat Dec 25, 2010 11:22 pm
- Forum: Divisional Math Olympiad
- Topic: DIGIT
- Replies: 24
- Views: 13019
Re: DIGIT
Yeah I also finally figured it out!!
my sol'n is also 512.
my sol'n is also 512.
- Sat Dec 25, 2010 11:15 pm
- Forum: Divisional Math Olympiad
- Topic: combi
- Replies: 12
- Views: 7645
Re: combi
btw, tushar er songe amar sol'n mile! :p
- Sat Dec 25, 2010 11:14 pm
- Forum: Divisional Math Olympiad
- Topic: combi
- Replies: 12
- Views: 7645
Re: combi
Bonji, tomar ki mone hoi na tumi aktu complicated hishab korteso!!
btw tomar oi soln purna sonkhai ashtese to??? ami calc dia fraction paitesi kan??
btw tomar oi soln purna sonkhai ashtese to??? ami calc dia fraction paitesi kan??