@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.

\[clubsuit\]

## Search found 238 matches

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

- 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!!

\[\clubsuit\]

\[\clubsuit\]

- Sat Dec 11, 2010 8:43 pm
- Forum: Site Support
- Topic: Difference?
- Replies:
**2** - Views:
**1658**

### Difference?

I cant get the deffrence between . Any 1 help me plz?

Code: Select all

` $$ and \[\]`

- 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
- 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

so, please feel me. Dont ban me

so, please feel me. Dont ban me