>>>>BTW, number 2 is a little bit unclear. What operation is done on ABCD, and what does empty space between x and 4 mean?
>>>
>>>Nadya,
>>>
>>>The "x" means to multiply. So it would be ABCD * 4 = DCBA.
>>>
>>>Renoir
>>
>>Yes, I guessed it after I wrote this letter, but was too lazy, to update :) Anyway, I'll think about them in the evening. Too buzy right now...
>
>Oh, for computer people I should have replaced "x" with "*".
>
>I posted the answers, in a reply to myself, on monday.
>
>Here goes another one, a simple calculation with Annabel (this time, I will use asterisks for multiplication!):
>
>

>(I'll continue the numbering, and call this "Problem #4".)
>
>ANN
>* A
>---
>BEL
>

>
>As usual, the same letter used more than once means the same digit. Different letters mean different digits.
>
>Enjoy it!
>
>Hilmar.

288*2=576