Prentice hall regents

Answer:
20
Questions:
How old are you?
How old were you when you got married?
How many sweaters do you own?
How many years have you been teaching?
2.
After all groups have finished, go around and have each group
read its question for each answer.
3.
If you are playing as a competition, give each group a point if the
question is grammatically correct. In the first example above, all
groups would get one point. But if a question is grammatically
incorrect, such as 
How old is you?
, do not give them a point. Tell
them it doesn’t matter what the “real” question is as long as it is
grammatical, although students usually want to know if they are
correct (unless they are being purposely funny). To satisfy their
curiosity, you could give one point for a grammatical question and
then another point (or 1/2 point) to the group(s) that have the
“real” question.