| Answer | Crossword Clue |
|---|---|
| BRAINTRAINING | Mental acuity development |
| WITS | Mental acuity |
| BRAINS | Mental acuity |
| SHARPWITTEDNESS | Mental acuity |
| BRAINAGE | Nintendo game with exercises for mental acuity |
| brainteaser | something (as a puzzle) that demands mental effort and acuity for its solution |
| brainteasers | BRAINTEASER, something (as a puzzle) that demands mental effort and acuity for its solution |
