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Math problem 333=6
Analysis:

3^ 1=3

3^2=9

3^3=27

3^4=8 1

3^5=243

3^6=729

……

It can be seen that each period of the last bit of 3 n is

3、 9、 7、 1

Because 333/4=83 and 1.

So the last digit of 333 333 is 3.

Is the last digit of (333 333) 333 a single digit or 3?

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