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1 vote
A 3-digit number uses only two different digits.

2 Answers

5 votes
101
110
202
220
303
330
404
440
505
550
606
660
707
770
808
880
909
990
User Sableraph
by
5.8k points
6 votes
707
808
909
202
101
303
606
404
505
User Shaun McCready
by
5.5k points