Merge pull request #30 from Dick-Lane/master

Remove "Question #" from top line of problem statement.
Merge branch 'master' of github.com:openwebwork/webwork-open-problem-library
Merge pull request #31 from Dick-Lane/master

revised phrasing
Merge branch 'master' of github.com:openwebwork/webwork-open-problem-library
Typeset "<" between popups so that they show as "<" in hardcopy.