Search found 10 matches

by Shapnil
Sat Jan 26, 2013 9:02 am
Forum: Secondary Level
Topic: a problem from the textbook
Replies: 3
Views: 1327

Re: a problem from the textbook

ya i've done the same.bt in the answer sheet of the text book it is x≥0.that's why i was confused.thanks
by Shapnil
Fri Jan 25, 2013 2:16 pm
Forum: Astronomy & Astrophysics
Topic: চাঁদ আর মানুষ
Replies: 17
Views: 7343

Re: চাঁদ আর মানুষ

এই প্রশ্নের একটা উত্তর ডিসকভারি চ্যানেলে দেখেছিলাম। মোস্ট প্রোবাবলি ফ্ল্যাগটা নরম্যাল ফ্ল্যাগ না। I mean that was a tube like flag and when they tried to uncover it that was a little bit shrunk. That was the reason why the flag was flying.
by Shapnil
Fri Jan 25, 2013 1:43 pm
Forum: Secondary Level
Topic: a problem from the textbook
Replies: 3
Views: 1327

a problem from the textbook

This problem is from text book of class 9-10.but I'm a little bit confused about it. Please help.
What is domain of the following function :
$F(x)=\ln x$
by Shapnil
Sun Mar 25, 2012 10:08 am
Forum: Secondary Level
Topic: DUET math olympiad 2012
Replies: 4
Views: 1330

DUET math olympiad 2012

This question has come in DUET math Olympiad 2012
1.If 3\[{3^a}={4^{b}}= 36\]
Then find the value of \[2/a+1/b\]
by Shapnil
Thu Mar 22, 2012 8:43 pm
Forum: National Math Olympiad (BdMO)
Topic: BdMO National Higher Secondary 2009/6
Replies: 6
Views: 2095

Re: BdMO National Higher Secondary 2009/6

my answer is also 1480.i may be wrong bt i'm trying to prove this first we consider that we'll chose three movers where all of them r sitting next to each other.we can select them in 40 ways. secondly,we can chose 2 movers in 40 ways.w\so, we've to chose 1 movers from (40-4) or 36 movers. then total...
by Shapnil
Thu Mar 22, 2012 8:20 pm
Forum: Secondary: Solved
Topic: Dhaka Secondary 2009/8
Replies: 8
Views: 3774

Re: Dhaka Secondary 2009/8

Plz give the full solution or a hint
by Shapnil
Thu Mar 22, 2012 8:19 pm
Forum: Secondary: Solved
Topic: Dhaka Secondary 2009/9
Replies: 10
Views: 4614

Re: Dhaka Secondary 2009/9

I was also confused at first.But i think the answer is zero
by Shapnil
Tue Feb 07, 2012 2:42 pm
Forum: National Math Olympiad (BdMO)
Topic: BdMO National Higher Secondary 2009/4
Replies: 3
Views: 1219

Re: BdMO National Higher Secondary 2009/4

I'm not sure about it.But I'm trying to solve it.If it is wrong plz send the write answer. I think the point p & M is same.because \[\angle APB> AMB> ACB.\] When P & M are different point. notice that,\[ \angle AMB= 2 \left (\angle ACB \right )\] in similar fashion we can prove the other eqation als...
by Shapnil
Thu Jan 12, 2012 11:29 pm
Forum: National Math Olympiad (BdMO)
Topic: BdMO National Secondary 2011/8
Replies: 9
Views: 2122

Re: BdMO National Secondary 2011/8

I'm not sure is this correct.But I'm trying to solve it
suppose nubmers of members are n.as no two members of that group can be teachers of each other
then then all members are student (except vaskarachrya).then he's the only teacher of the group.then we can sayit is a uniqe way
by Shapnil
Tue Jan 10, 2012 11:14 am
Forum: Secondary Level
Topic: I can't solve it
Replies: 2
Views: 932

I can't solve it

A series is formed in the following manner
A(1)=1
A(n)=f(m) numbers of f(m)followed by f(m) numbers of 0;
m is the number of digits in A(n-1)
Find A(30). Here f(m) is the remainder when m is divided by 9
I can't solve this.Plz help. :( :oops: :( :cry: