6 1 2 3 6 5 5 6 5 3 6 4 8 5 9 6 0 9 8 9 7 6 5 5 7 8 7 8 7 6 5 6 4 3 6 5 4 6 7 5 8 6 9 7 8 9
What is the last digit of the number above?
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6 2 = 3 6 So it is clear that for any n > 0 integer, 6 n ends in a 6 .
The last digit of 6 1 2 3 6 5 5 6 5 3 6 4 8 5 9 6 0 9 8 9 7 6 5 5 7 8 7 8 7 6 5 6 4 3 6 5 4 6 7 5 8 6 9 7 8 9 equals to 6 1 , so it is 6 .
6 to the power any number will always have 6 in the units digit.
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here it is:
6 1 = 6
6 2 = 3 6
6 3 = 2 1 6
6 4 = 1 2 9 6
6 5 = 7 7 7 6
. . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . .
every time, the last digit is 6.so, the last digit will be 6.