Mike Simmons wrote:

P.S. A frog is at the bottom of a 30-foot well. Every day he moves
up 3 feet and during the night he slips back 2 feet for a net rise of
1 foot per day. How many days does it take for him to get out of the
well? If you think the answer is 30 days then you haven't been paying
attention.
:-)

Hzzz... gjragl rvtug qnlf?