| Date | Grid | Clue | Author | Editor |
|---|---|---|---|---|
| Sat Sep 15, 1990 | 60A | Do the impossible | Kevin Boyle | Maleska |
| Sat May 30, 1987 | 49A | Do the impossible | Vaughn Keith | Maleska |
| Sat Dec 13, 1986 | 7D | Impossible math instruction | Ernst Theimer | Maleska |
| Sat Jun 21, 1986 | 40A | Do the impossible | Peter Swift | Maleska |
| Tue May 5, 1981 | 24A | Math professor's "impossible" command | Janke | Maleska |
| Wed Jan 24, 1979 | 9D | An instruction impossible to fulfill | Jean J. Davison | Maleska |
| Fri Aug 27, 1976 | 50A | Accomplish the impossible | Sophie Fierman | Weng |
| Wed May 9, 1973 | 7D | Do the impossible | Unknown | Weng |
| Fri Apr 7, 1967 | 7D | Try a mission impossible. | George Laczko | Farrar |
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