A history test had three questions on presidents of the United States. Here are the answers of six students:
1. Polk, Polk, Taylor.
2. Taylor, Taylor, Polk.
3. Fillmore, Fillmore, Polk.
4. Taylor, Polk, Fillmore.
5. Fillmore, Taylor, Taylor.
6. Taylor, Fillmore, Fillmore.
Every student answered at least one question correctly.
What are the correct answers?
Solution