Revision history of "TDSM 2.27"

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  • (cur | prev) 23:30, 12 September 2017Trtnguyen (talk | contribs). . (848 bytes) (+848). . (Created page with "- If 0 can be the first digit: For first 4 digits, choose randomly from the set 7 numbers: {0, 1, 8, 2, 5, 6, 9} <math>\Rightarrow</math> there are <math>7^4</math> ways to d...")