@Shawon: Actually your solution is not correct, and Mehfuj is right. Just check a few more equations (or the whole set of 25 equations!) manually. Actually you have to do like subtract,add, subtract...so on.
So the ans will be $AZ=12+3\cdots26=13$.
Rangpur Higher Secondary 2011/7
Forum rules
Please don't post problems (by starting a topic) in the "Higher Secondary: Solved" forum. This forum is only for showcasing the problems for the convenience of the users. You can post the problems in the main Divisional Math Olympiad forum. Later we shall move that topic with proper formatting, and post in the resource section.
Please don't post problems (by starting a topic) in the "Higher Secondary: Solved" forum. This forum is only for showcasing the problems for the convenience of the users. You can post the problems in the main Divisional Math Olympiad forum. Later we shall move that topic with proper formatting, and post in the resource section.
Re: Rangpur Higher Secondary 2011/7
"Inspiration is needed in geometry, just as much as in poetry."  Aleksandr Pushkin
Please install LaTeX fonts in your PC for better looking equations,
learn how to write equations, and don't forget to read Forum Guide and Rules.
Please install LaTeX fonts in your PC for better looking equations,
learn how to write equations, and don't forget to read Forum Guide and Rules.
 leonardo shawon
 Posts: 169
 Joined: Sat Jan 01, 2011 4:59 pm
 Location: Dhaka
Re: Rangpur Higher Secondary 2011/7
sorry to argue.. Sorry
Ibtehaz Shawon
BRAC University.
long way to go .....
BRAC University.
long way to go .....
 Tahmid Hasan
 Posts: 665
 Joined: Thu Dec 09, 2010 5:34 pm
 Location: Khulna,Bangladesh.
Re: Rangpur Higher Secondary 2011/7
moon bhai i have a prob with the prob,u c that there r 25 eqs but the value of the last eq is 26,y?
বড় ভালবাসি তোমায়,মা
Re: Rangpur Higher Secondary 2011/7
amar mone hoi question e r sequence e vul ase..... y+z er value hobar kotha 25..... so amar value ashse 13.. agreed tahmid bro

 Posts: 21
 Joined: Tue Sep 27, 2011 12:18 am
Re: Rangpur Higher Secondary 2011/7
ans is 13.