on google answers  i see older dated unswered questions with the
remark of 67days remaining 134 days,45days,etc.  how does that happen'

Hello Rr3225,

After Google Answers was started, there were some changes made in the
duration of questions. For example,
http://answers.google.com/answers/main?cmd=search&q=%2Bthe&qtype=unanswered&num=10&sort=qeendts:D:R:d1

shows a number of questions that are still unaswered with days
remaining ranging from 107 to 102 days left [today it does]. If you
work it out, the original question was posted with a period of one
year (365 days) to answer the question.

For reference, the oldest unanswered question is
http://answers.google.com/answers/main?cmd=threadview&id=3153
which was asked almost a year ago. There are just over 20 "old"
unanswered questions left.

The limit on how long a question can be left open was changed late in
June 2002 to a month (30 days).

  --Maniac