This page is open to all but is specifically for students of Algebra I using the text Algebra I, Concepts and Skills, copyright 2001 by McDougal Littell Inc. All links are coordinated with the sections of the listed text. Students are encouraged to make helpful suggestions that would improve the usefulness of this page. If you are attempting the Problem Challenge, be sure to include all your work with the solution.

At his birthday party, Mr. Green would not directly tell how old he was. He said, "If you add the year of my birth to this year, subtract the year of my tenth birthday and the year of my fiftieth birthday, and then add my present age, the result is eighty."

How old is Mr. Green?

This problem will be changed on a weekly basis as appropriate with the solution being made available the day after a new problem is posted and the old problem is removed.