Sudoku puzzles are popular among teenagers and even grow-ups. Many people may ask why these teenagers are so interested in these puzzles. When you begin to play the games, you may find it is really interesting because of the logic（邏輯）in the games.

Sudoku is a Japanese number puzzle based on logic rather than math.Sudoku became popular in early 2005 in the form of books. But now you can find Sudoku App, board games and electronic versions online. You can even find the game in some newspapers.

To solve the puzzle, a single number (from 1 to 9) must be entered in each blank box so that each number used only once in each smaller square and only once in each row and column in the larger square.

How long does a player need to work out the puzzle? Usually, it depends on the speed and the capability (能力) of the player. If you are a beginner, it will take you quite a longer time but you are an experienced Sudoku player you can be faster.

Sudoku puzzles can exercise your brain better. Scientists say solving them depends on neural pathways（神經(jīng)通路）that even the most powerful computers can’t copy. That is why Sudoku Puzzles can make people cleverer. Many people become addicted to it because it can give the player a great sense of achievement.

1.Sudoku puzzles are based on _______rather than math.

A. numbers B. logic C. speed D. capability

2.People can find Sudoku puzzles in the following ways except _________.

A. in boxes B. in app store C. in newspapers. D. on the Internet

3.Why do scientists say loving Sudoku puzzles can make people more clever?

A. Because it is a math puzzle.

B. Because the player need to use his capability.

C. Because the player must play very fast.

D. Because solving these Sudoku puzzles depends on neural pathways.

4.Which of the following is true according to the passage?

A. You only need to use math skills to play Sudoku.

B. Japanese people began to play Sudoku in early 2005, but it wasn’t popular.

C. The more you play Sudoku, the faster you can be.

D. Playing Sudoku can make people cleverer, so lots of people are addicted to it.

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