sharp as a tack वाक्य

Shoppers choose to barter with one of six fictional hagglers, each of whom has a name like Monte or Vince or Dot, and a personality description along the lines of " Sharp as a tack and ready to cut a deal ."
In a statement, she said : " He sounded strong at the time, and so upbeat and completely sharp as a tack, as always, " said Stafford, " I was shocked to find out barely a month later that he was gone ."
Here's what I thought when the movie ended : Compared with the main character, Leonard, who has to tattoo messages on himself and snap Polaroids to remember what the heck he's doing, my own mind is actually OK . Sharp as a tack.
In her return engagement as Oscar M . C ., Goldberg lacked Billy Crystal's speed and Johnny Carson's icy sardonic wit, but she was sharp as a tack and delightfully irreverent, and her hosting was a clear cut above the work of last year's David Letterman, whose awkward and unfunny stumbling around ( remember those " Uma and Oprah " jokes ? ) was considered something of an Oscar nadir.