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CJam, 10 programs, 1 byte
I thought I'd better add this right off the bat before someone else gets cheeky and does it :P
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A CJam program with just a plain number outputs that number, so this is an easy way to get 10 programs that work, namely:
0, 1, 2, 3, 4, 5, 6, 7, 8, and 9.
The next pro...