Sudoku is a table of numbers that is one of the best brain exercises and IQ boosters. Scientists say that by solving sudoku, the human brain will be ten years younger. This table is a square table that has 9 rows and 9 columns and is also divided into 9 squares equal to 3×3.

In this table, some numbers are placed by default, and the rest of the numbers must be found by following three rules:

• Put 1 to 9 numbers in each row without repetition.
  
• In each column, numbers 1 to 9 should be placed without repetition.
  
• In each 3x3 area, place a table of numbers 1 to 9 without repetition.
  

This program has 400 tables in four levels of easy, medium, difficult and professional that will keep you entertained for a long time and help strengthen your mind.