BrainBashers Puzzles

A. The year 2013 uses four different digits. When did this last happen?

B. The digits in 2013 form a sequence (0, 1, 2, 3). When did this __last__ happen (not necessarily the same digits)?

C. The digits in 2013 form a sequence (0, 1, 2, 3). When will this __next__ happen (not necessarily the same digits)?

[Ref: ZWNJ] © Kevin Stone

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