Explanation
In this question, the so-called "decimal with only a
finite number of nonzero digits" could be called a terminating decimal, since
the number of significant digits terminates at a point. One way that
could give a
terminating decimal is if it yields an integer. Otherwise, if it yields a
fraction such as
or
, then it terminates (as 0.25 or 0.20,
respectively). But if it yields, say
, it doesn't terminate. This could get complicated,
but we will analyze by cases and remain organized, evaluating the statements
separately first.
Statement (1) tells us that q is a factor of 12. It could be 1, 2, 3, 4, 6, or 12. That narrows
the field substantially, but we know nothing about p. We can allowably choose p and
q to give us
or
, in two separate cases. Those cases yield different
answers to the question, so we do not have sufficient information to answer the
question definitively. Statement (1) is insufficient.
Statement (2) allows us to choose the same two cases we
were just looking at, so Statement (2) is also insufficient.
Combining the statements, we can still choose the same two cases we were just looking at,
and
, so the statements
combined are insufficient.
The correct answer is (E).
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