Question

which digit is at the units place of (109)power 2
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Answer 1

Answer:

81

Step-by-step explanation:

81 Is the last to digits of your question

Answer 2

Answer:

1

Step-by-step explanation:

109² 's unit digit we be that of 9²

we know 9² is 81

so unit digit of 9² is 1 and hence unit digit of 109² is also 1