Search found 7 matches

by Sudip Deb new
Sun May 01, 2011 8:58 pm
Forum: Secondary Level
Topic: Keo ki proman korte parbe - Por por 5 ti kromic sonkhar gunf
Replies: 2
Views: 1165

Keo ki proman korte parbe - Por por 5 ti kromic sonkhar gunf

Keu ki proman korte parbe - por por 5 ti kromic sonkhar gunfol 5! (factorial) diye bivajjo ?
by Sudip Deb new
Sun Jan 30, 2011 10:04 am
Forum: National Math Olympiad (BdMO)
Topic: Prove
Replies: 2
Views: 1160

Prove

Prove that (n^5 - n) is divided by 5 .
by Sudip Deb new
Sun Jan 30, 2011 9:50 am
Forum: Secondary Level
Topic: Largest value of (x+y)
Replies: 4
Views: 1272

Re: Largest value of (x+y)

The answar is 182.818181... . When the y is 182.81818... and the x is o . We divide by the smaller number which is 11 . If we divide by the 20 or both the answar will be smaller then 182.818181... . So thats the answar .
by Sudip Deb new
Wed Jan 26, 2011 1:50 pm
Forum: Divisional Math Olympiad
Topic: A Problem
Replies: 4
Views: 1344

Re: A Problem

I can't understad ur answar . May be it is not the answar
by Sudip Deb new
Wed Jan 26, 2011 10:04 am
Forum: Secondary: Solved
Topic: Dhaka Secondary 2010/6
Replies: 7
Views: 1948

Re: Dhaka Secondary 2010/6

Yaap . Ami bistarito vabe bollam .
by Sudip Deb new
Wed Jan 26, 2011 10:00 am
Forum: Secondary: Solved
Topic: Dhaka Secondary 2009/2
Replies: 6
Views: 3090

Re: Dhaka Secondary 2009/2

FroM (DBC)^2
by Sudip Deb new
Wed Jan 26, 2011 9:58 am
Forum: Secondary: Solved
Topic: Dhaka Secondary 2009/11
Replies: 4
Views: 1976

Re: Dhaka Secondary 2009/11

Ok I am giving some hints,
4^502 = 2^2008,
and 2 x 2^2008 = 2^2009 .
and (a+b)^2 - (a-b)^2 = 2a^2 + 2b^2 . Now try yourself .