| Answer | Crossword Clue |
|---|---|
| COGITATE | Think hard |
| RACKONESBRAINS | Think hard |
| CEREBRATE | Think hard |
| FOCUS | Think hard |
| TRYTOREMEMBER | Think hard |
| USETHEOLDNOODLE | Think really hard |
| RACKONESBRAIN | Think really hard |
| STRAINYOURBRAIN | Think too hard |
| RACKONESBRAINS | Think extremely hard |
| CALCULATOR | Rack one's ... (think hard) |
| TRYTOREMEMBER | Think hard, as during a test |
| TETE | "Se creuser la .." (think really hard: Fr.) |
| puzzles | Think hard about something difficult to understand or explain |
| puzzle | Think hard about something difficult to understand or explain |
