Logic puzzles
https://www.pleacher.com/mp/puzzles/mpuzzle2.html
http://mrbartonmaths.com/puzzles/#27
http://mrbartonmaths.com/puzzles/#27
**Tower of Hanoi (famous logic puzzle)
https://www.mathsisfun.com/games/towerofhanoi.html
http://www.coolmath-games.com/0-tower-of-hanoi
http://vornlocher.de/tower.html
http://mrbartonmaths.com/puzzles/#27
http://mrbartonmaths.com/puzzles/#27
Sudoku
Cool Math
http://www.coolmath.com/0-math-puzzles.html
http://www.coolmath-games.com/
Algebra Four
Students play a generalized version of connect four, gaining the chance to place a piece on the board by solving an algebraic equation. Parameters: Level of difficulty of equations to solve and type of problem. Algebra Four is one of the Interactivate assessment games.
http://www.shodor.org/interactivate/activities/AlgebraFour/
Systems of Equations Game
http://www.math-play.com/System-of--Equations-Game.html
Slope-Intercept Game
http://www.math-play.com/slope-intercept-game.html
Math Puzzles/Games
http://www.learn-with-math-games.com/math-puzzles.html
http://www.math-play.com/Algebra-Math-Games.html