Can You Solve these Tricky Sudokus?

Can you tell which number goes in the red frame in this 4x4 Sudoku?

Can you tell which number goes in the red frame in this 4x4 Sudoku?

2

4

3

1

You will never run out of Sudokus – there are 6,670,903,752,021,072,936,960 possible combinations, more than enough for several dozen lifetimes!

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Interesting fact

You will never run out of Sudokus – there are 6,670,903,752,021,072,936,960 possible combinations, more than enough for several dozen lifetimes!