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AHSME 1961 Problem 28

    If 21377532137^{753} is multiplied out, the units' digit in the final product is: (A) 1(B) 3(C) 5(D) 7(E) 9\textbf{(A)}\ 1 \textbf{(B)}\ 3 \textbf{(C)}\ 5 \textbf{(D)}\ 7 \textbf{(E)}\ 9

    Dataset text NuminaMath-1.5. Quoted with source.

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