Add punctuation: Solve the jigsaw puzzles before the time is up
A: Solve the jigsaw puzzles before the time is up!

Add punctuation: Before you can open a CHESSTITAN file youll need to figure out what kind of file the CHESSTITAN file extension refers to
A: Before you can open a CHESSTITAN file, you'll need to figure out what kind of file the CHESSTITAN file extension refers to.

Add punctuation: Used but in good condition 4 pots and a pan
A:
Used, but in good condition. 4 pots and a pan.