Posted by sh on Tuesday, June 16, 2009 at 1:55pm.
since first bar cannot be a zero possibiltiies of first numeral is 9, and since repition is allowed, the last 3 slots are allowed to be 10 therefore,
9 x 10 x 10 x 10 (had u forgotten that it said even or odd numbers only, just simply divide by 2) other than that the answer is 9000.
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