## Search found 829 matches

Thu Feb 05, 2015 9:51 pm
Forum: Secondary Level
Topic: Practice Problem Set for National (Secondary Category)
Replies: 2
Views: 2665

### Practice Problem Set for National (Secondary Category)

I am posting here a practice problem set for Secondary level students. Happy practising
Thu Feb 05, 2015 9:39 pm
Forum: Junior Level
Topic: Practice Problem Set for National (Junior Category)
Replies: 0
Views: 2353

### 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 :)
Sun Feb 10, 2013 6:09 pm
Forum: Social Lounge
Topic: বইমেলায় গণিত অলিম্পিয়াড
Replies: 8
Views: 6372

### Re: বইমেলায় গণিত অলিম্পিয়াড

Don't know about Math Foundation. But, this time there is no stall named "গনিতের বই"
Thu Feb 07, 2013 11:21 pm
Forum: Secondary Level
Topic: Number theory
Replies: 1
Views: 2053

### Re: Number theory

When $k$ divides $a$ and $a+1$ then, $k$ divides $a+1-a=1$
so, $k=1$
Thu Feb 07, 2013 10:45 pm
Topic: BdMO National Higher Secondary 2007/7
Replies: 6
Views: 3848

### 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...
Thu Feb 07, 2013 10:37 pm
Topic: Let us help one another preparing for BdMO national 2013
Replies: 12
Views: 6686

### 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 $x$ ??
Tue Feb 05, 2013 6:54 pm
Forum: Secondary Level
Topic: Geometric Calculation
Replies: 3
Views: 3052

### Re: Geometric Calculation

Li is a chinese unit
but, what is "in 2 Li" ?
Tue Feb 05, 2013 2:12 pm
Forum: Secondary Level
Topic: Geometric Calculation
Replies: 3
Views: 3052

### 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...
Tue Feb 05, 2013 2:05 pm
Forum: Secondary Level
Topic: Combinatorics
Replies: 5
Views: 3490

### Re: Combinatorics

Fahim Shahriar wrote: It's $7$. For $n$ distinguishable fair coins, $(n+1)$ outcomes.
yes. You are right. So, is mahi.
now, someone edit that 'in'.
Sun Feb 03, 2013 11:14 am
Forum: Secondary Level
Topic: Combinatorics
Replies: 5
Views: 3490

### Re: Combinatorics

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