Question 1187608
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ANSWER: a) 18<br>
The number is 2592:  (2^5)(9^2) = 32*81 = 2592<br>
I doubt there is an algebraic way to find the answer.<br>
Logical analysis might cut way down on the number of possibilities, making a solution by hand practical.<br>
I found the solution using a "brute force" excel spreadsheet, looking at all 4-digit numbers not using digit 0.<br>
If you know some computer programming, you could also write a fairly simple program that would find the answer.<br>