## Search found 1175 matches

- Fri Dec 26, 2014 12:05 am
- Forum: Introductions
- Topic: It's Me! *Mahi* - Nur Muhammad Shafiullah
- Replies:
**0** - Views:
**3649**

### It's Me! *Mahi* - Nur Muhammad Shafiullah

Hello! I am Nur Muhammad Shafiullah, from Dhaka, Bangladesh. I am from Dhaka College, HSC batch 2014. Before that, I was in Monipur High School & College, SSC batch 2012. I have been an International Mathematical Olympiad (IMO) contestant from Bangladesh from 2011 to 2014 [1]- currently holding the ...

- Tue Dec 23, 2014 12:45 pm
- Forum: Number Theory
- Topic: Equation On Sum Of Divisor
- Replies:
**2** - Views:
**1896**

### Re: Equation On Sum Of Divisor

Hint/ideas for the second solution? Because after finding the one liner, there are too many ways to take on this.

- Thu Dec 04, 2014 9:08 pm
- Forum: National Math Olympiad (BdMO)
- Topic: BdMO National 2013: Primary 2, Junior 1
- Replies:
**11** - Views:
**6764**

### Re: BdMO National 2013: Primary 2, Junior 1

That was because I edited the post. Forgot to clarify that part, sorry.

- Thu Dec 04, 2014 9:06 pm
- Forum: News / Announcements
- Topic: Next Olympiad
- Replies:
**4** - Views:
**5025**

### Re: Next Olympiad

Yes you can, and no, they can't.

- Mon Nov 24, 2014 8:51 pm
- Forum: Number Theory
- Topic: function for quadratic residue
- Replies:
**2** - Views:
**1826**

### Re: function for quadratic residue

This question is meaningless without fixing a proper range for $f$ - for example, every $a$ satisfies the conditions if $f(x)=\sqrt {x+a}$.

- Sun Oct 26, 2014 9:05 am
- Forum: Computer Science
- Topic: Hackers again
- Replies:
**10** - Views:
**9818**

### Re: Hackers again

Download and scan your PC with one of these:

1. Spybot search and destroy http://www.safer-networking.org/mirrors/

2. Malwarebytes anti-malware tools http://www.malwarebytes.org/mwb-download/

That should be enough.

1. Spybot search and destroy http://www.safer-networking.org/mirrors/

2. Malwarebytes anti-malware tools http://www.malwarebytes.org/mwb-download/

That should be enough.

- Thu Oct 23, 2014 6:11 pm
- Forum: News / Announcements
- Topic: Combinatorics Workshop: Day 1 (04.12.13)
- Replies:
**7** - Views:
**7223**

### Re: Combinatorics Workshop: Day 1 (04.12.13)

Which one, and which part was the problem? They are discussed quite comprehensively here. I don't think we can do any better if you do not point to a specific part of the examples.

- Wed Oct 22, 2014 7:59 pm
- Forum: Secondary Level
- Topic: Functional divisibility
- Replies:
**3** - Views:
**2227**

### Re: Functional divisibility

$f^{100}(n) = 3^{100}(n+1)-1$, and if the proposition is correct this too implies $3|1$.

Any corrections, Mim?

Any corrections, Mim?

- Tue Oct 21, 2014 10:16 am
- Forum: Algebra
- Topic: (Angle)^(Side)[Inequality]
- Replies:
**7** - Views:
**3494**

### Re: (Angle)^(Side)[Inequality]

This function is concave for $x \in \left (0, \frac \pi 2 \right )$ and convex for $x \in \left ( \frac \pi 2 , \pi \right )$.

- Mon Oct 20, 2014 11:16 pm
- Forum: Algebra
- Topic: (Angle)^(Side)[Inequality]
- Replies:
**7** - Views:
**3494**

### Re: (Angle)^(Side)[Inequality]

On which function?