>I plan to post the answers to these on monday.
>
>
>1) Can the following expression be simplified?
>
>

>(x-a)(x-b)(x-c)...(x-z)
>

>
>Only basic algebra is required.
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>In the following problems, each letter represents a digit. Same letter, same digit. Different letters mean different digits.
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>2.
>

>ABCD
>x  4
>----
>DCBA
>

>
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>3.
>

> SEND
>+MORE
>-----
>MONEY
>

>
>
>Regards, Hilmar.

BTW, number 2 is a little bit unclear. What operation is done on ABCD, and what does empty space between x and 4 mean?