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Difficulty—
What is the units digit of \(19^{40}?\)
A) 9
B) 4
C) 3
D) 2
E) 1
[spoiler]OA=E[/spoiler]
Source: Manhattan GMAT
A) 9
B) 4
C) 3
D) 2
E) 1
[spoiler]OA=E[/spoiler]
Source: Manhattan GMAT
