Hello deatheather216,

Thank you for your post! As far as I know, Khan Academy doesn't provide time limits on problems and practice quizzes, but speed badges such as Picking Up Steam and Sub-Light Speed can be earned on practice quizzes when you solve each problem within a designated time. There is no active timer on the site, but Jett Burns created a really cool bookmarklet which will let you view that time limit on each practice quiz.