Holiday Puzzles 2019

 1. 20/20 VISION Use the digits 1 through 9, in increasing order, to make the new year of 2020. You can only add the symbols + – × / ( ).

2. COLORFUL TEAMS
Match these Division I college football
schools with their colorful team names:
 1. Alabama A. Black Knights 2. Arkansas B. Blue Devils 3. Army C. Blue Raiders 4. California D. Crimson Tide 5. Duke E. Golden Bears 6. Georgia F. Golden Eagles 7. Hawaii G. Golden Flashes 8. Kent State H. Golden Gophers 9. Miami (of Ohio) I. Golden Hurricane 10. Middle Tennessee J. Green Wave 11. Minnesota K. Mean Green 12. North Texas L. Orange 13. Rutgers M. Rainbow Warriors 14. Southern Mississippi N. RedHawks 15. Syracuse O. Red Raiders 16. Texas Tech P. Red Wolves 17. Tulane Q. Scarlet Knights 18. Tulsa R. Yellow Jackets

 3. TWO-DIGIT TOPOLOGY Insert a different two-digit number in each circle. Circles are connected by a line if the numbers they contain either differ by 1, have a ratio of 2 or 3, or look like the other when turned upside down. For example, 92 could be connected to 26, 46, 91, or 93. Leading zeroes are not allowed.

 4. MNO In every grid below, each row and column should contain 2 dots and 1 letter. The letter M indicates it is the Midpoint of the dots in its row and column. The letter N indicates it is between the dots but Not the midpoint. The letter O indicates it is Outside the dots. Fill in the missing symbols and dots.

 5. CHESS MATES Add a white piece to the position below so that there is mate in 1 move. Then add different white pieces to the same square so that there are mates in 2, 3, and 4 moves. (Thanks to George Sicherman)