There is an error on the clock item, I believe...<BR>In 12 hours the hour hand spins 360 degrees, and 360 divided by 12 is 30, so it moves 30 degrees in one hour. 30 degrees divided by 60 minutes is 0.5 degrees, so it should have said "if the hour hand on a clock moves one-half degree every minute..." and the answer should have been 30. That is, unless the point was that the clock is broken.
Oh, yeah, and if the original should have said minute hand, then it's still wrong. The minute hand moves 6 degrees a minute.