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Princeton Review
If a is a positive integer and the tens digit of 10a is 3, which of the following is the units digit of a?
A. 1
B. 3
C. 5
D. 7
E. 9
OA B
If a is a positive integer and the tens digit of 10a is 3, which of the following is the units digit of a?
A. 1
B. 3
C. 5
D. 7
E. 9
OA B
