| Cassandra is sharp as a tack, awkward, and still young enough to greet her awakening desire and finer perceptions with astonishment and hyperbole. |
| Viewing examples of each, I was drawn to the platinotype with its warm tonal scale, and its sharp as a tack image, because it requires a negative the same size as the image. |
| When Mum died at ninety she was still as sharp as a tack. Everything else wore out. |
| This guy's as sharp as a tack and I respect his opinions immensely. |
| She is as sharp as a tack, but excellent company in a social setting. |
| I found him to be sharp as a tack analytically while still in his nineties. |
