Search found 829 matches

by nafistiham
Thu Feb 05, 2015 9:51 pm
Forum: Secondary Level
Topic: Practice Problem Set for National (Secondary Category)
Replies: 2
Views: 848

Practice Problem Set for National (Secondary Category)

I am posting here a practice problem set for Secondary level students. Happy practising :) :) :)
by nafistiham
Thu Feb 05, 2015 9:39 pm
Forum: Junior Level
Topic: Practice Problem Set for National (Junior Category)
Replies: 0
Views: 831

Practice Problem Set for National (Junior Category)

I am posting here a practice problem set for junior level students. Happy practicing :) :) :)
junior.pdf
Totally MS word :)
(405.81 KiB) Downloaded 402 times
by nafistiham
Sun Feb 10, 2013 6:09 pm
Forum: Social Lounge
Topic: বইমেলায় গণিত অলিম্পিয়াড
Replies: 9
Views: 3124

Re: বইমেলায় গণিত অলিম্পিয়াড

Don't know about Math Foundation. But, this time there is no stall named "গনিতের বই"
by nafistiham
Thu Feb 07, 2013 11:21 pm
Forum: Secondary Level
Topic: Number theory
Replies: 1
Views: 650

Re: Number theory

When $k$ divides $a$ and $a+1$ then, $k$ divides $a+1-a=1$
so, $k=1$
by nafistiham
Thu Feb 07, 2013 10:45 pm
Forum: National Math Olympiad (BdMO)
Topic: BdMO National Higher Secondary 2007/7
Replies: 6
Views: 1235

Re: BdMO National Higher Secondary 2007/7

here, $x^7-1=f(x)\cdot(x-1)$ so, \[f(x)|(x^{42}-1),(x^{35}-1),(x^{28}-1),(x^{21}-1),(x^{14}-1),(x^7-1)\] so, the remainder will be \[7\] How does the green line lead to the red line? :? :? :?: :?: actually, what I didn't think much important to mention was this \[f(x)|x^{7}-1|x^{7n}-1\] It should b...
by nafistiham
Thu Feb 07, 2013 10:37 pm
Forum: National Math Olympiad (BdMO)
Topic: Let us help one another preparing for BdMO national 2013
Replies: 12
Views: 2289

Re: Let us help one another preparing for BdMO national 2013

Shadmanmajid wrote:Problem no.3- For a positive integer n, find the number of solutions of the congruence x
2 ≡ 1 (mod n).
where is the $x$ ??
by nafistiham
Tue Feb 05, 2013 6:54 pm
Forum: Secondary Level
Topic: Geometric Calculation
Replies: 3
Views: 976

Re: Geometric Calculation

Li is a chinese unit
but, what is "in 2 Li" ?
by nafistiham
Tue Feb 05, 2013 2:12 pm
Forum: Secondary Level
Topic: Geometric Calculation
Replies: 3
Views: 976

Re: Geometric Calculation

When visiting a rectangular plantation, the foreman told you that they recently put up 28 Li of fencing around the entire plantation. Having spent hours walking the width of the plantation, you know that it is 3 Li long. What is the area ( in 2 Li ) of the plantation? I believe it is copied from an...
by nafistiham
Tue Feb 05, 2013 2:05 pm
Forum: Secondary Level
Topic: Combinatorics
Replies: 5
Views: 1075

Re: Combinatorics

Fahim Shahriar wrote: It's $7$. For $n$ distinguishable fair coins, $(n+1)$ outcomes.
yes. You are right. So, is mahi. :oops:
now, someone edit that 'in'.
by nafistiham
Sun Feb 03, 2013 11:14 am
Forum: Secondary Level
Topic: Combinatorics
Replies: 5
Views: 1075

Re: Combinatorics

As they are indistinguishable, it should be $6.$