121? or do U want something more substantive?
after deleting the last digit (1), we get 12, not a square.
confused; it says deleting its last two digits; e.g., 121 would prune the 21 leaving 1; if deleting just last digit, then answer would be 16; hope I'm not reading wrong - enjoy the problems on this site;
Sorry. My mistake
The problem as stated is not very interesting. Something should be added to produce a more interesting problem.