Search found 238 matches

by Hasib
Sun Dec 12, 2010 3:43 pm
Forum: Higher Secondary Level
Topic: An interesting problem
Replies: 7
Views: 2799

Re: An interesting problem

@Avik da: same problem. Jst i change the problem a bit. The main problem was upto i. That means upto:
\[\overline{abcdefghi} \equiv 0(mod 9)\]
And none of {a,b,c....i} are 0.

The problem is from The Art and craft of problem solving.

\[clubsuit\]
by Hasib
Sat Dec 11, 2010 10:27 pm
Forum: Higher Secondary Level
Topic: An interesting problem
Replies: 7
Views: 2799

Re: An interesting problem

@Moon vaia: Sorry, now the problem is correct fully!!

\[\clubsuit\]
by Hasib
Sat Dec 11, 2010 8:43 pm
Forum: Site Support
Topic: Difference?
Replies: 2
Views: 1658

Difference?

I cant get the deffrence between

Code: Select all

 $$ and \[\]
. Any 1 help me plz?
by Hasib
Sat Dec 11, 2010 6:32 pm
Forum: Higher Secondary Level
Topic: An interesting problem
Replies: 7
Views: 2799

An interesting problem

Solve this: \[\begin{align*}a & \equiv 0(mod 1) \\ 10a+b & \equiv 0(mod 2) \\ 100a+10b+c & \equiv 0(mod 3) \\ 1000a+100b+10c+d & \equiv 0(mod 4) \\ 10000a+1000b+100c+10d+e & \equiv 0(mod 5) \end{align*}\] it's continuas up to j. That means: \[abcdefghij \equiv 0(mod10)\] the all {a,b,c,d....j} are d...
by Hasib
Sat Dec 11, 2010 6:16 pm
Forum: Secondary Level
Topic: Number Theory(congruance)
Replies: 10
Views: 4418

Re: Number Theory(congruance)

ThanQ Moon vaia /clubsuit
by Hasib
Fri Dec 10, 2010 10:11 pm
Forum: Secondary Level
Topic: Number Theory(congruance)
Replies: 10
Views: 4418

Re: Number Theory(congruance)

Why my code doesnt working?
by Hasib
Fri Dec 10, 2010 2:53 pm
Forum: Secondary Level
Topic: Number Theory(congruance)
Replies: 10
Views: 4418

Number Theory(congruance)

If $x^3+y^3=z^3$ Show that one of the three must be a multiple of 7
by Hasib
Fri Dec 10, 2010 11:48 am
Forum: National Math Olympiad (BdMO)
Topic: BdMO 2010 H. Sec. problem 8
Replies: 22
Views: 8093

Re: BdMO 2010 H. Sec. problem 8

How nice solution! I am not well know to use LaTeX or any code :cry:

so, please feel me. Dont ban me