## Search found 238 matches

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.

$clubsuit$
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!!

$\clubsuit$
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?
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...
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
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?
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
Fri Dec 10, 2010 11:48 am