If a number p is prime, and 2p+1 = q, where q is also prime, then the decimal expansion of 1/q will produce a decimal

[BTGmoderatorDC]

If a number p is prime, and 2p+1 = q, where q is also prime, then the decimal expansion of 1/q will produce a decimal with q-1 digits. If this method produces a decimal with 166 digits, what is the units digit of the product of p and q?

A. 1
B. 3
C. 5
D. 7
E. 9



OA E

Source: Veritas Prep

[gmatter2012]

If a number p is prime, and 2p+1 = q, where q is also prime, then the decimal expansion of 1/q will produce a decimal with q-1 digits. If this method produces a decimal with 166 digits, what is the units digit of the product of p and q?

A. 1
B. 3
C. 5
D. 7
E. 9



OA E

Source: Veritas Prep

Please correct the OA, the correct answer is A
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