NUMBER PUZZLES

Classic Sudoku

https://www.hotsr.com/sudoku/

Diagonal Sudoku

https://www.hotsr.com/sud_diagonal/

Irregular Sudoku

https://www.hotsr.com/sud_irregular/

Mega Sudoku

https://www.hotsr.com/sud_mega/

Multi Sudoku

https://www.hotsr.com/sud_multi/

Sum Sudoku

https://www.hotsr.com/sud_sum/

Kakuro

https://www.hotsr.com/kakuro/

Calcudoku

https://www.hotsr.com/calcudoku/

Killer Sudoko

https://www.hotsr.com/killersudoku/

Killer Sudoko Pro

https://www.hotsr.com/killersudokupro/

Sudoku X

https://www.hotsr.com/sudokux/

Hitori

https://www.hotsr.com/hitori/

Futoshiki

https://www.hotsr.com/puzzles/futoshiki