THE CORRECT ANSWER IS (B). BY DEFINITION, 5(X1Y) IS DIVISIBLE BY 5...
14. The correct answer is (B). By definition, 5(x
1
y) is divisible by 5, but you also need
to know whether z is divisible by 5. Statement (1) provides no additional information.
However, statement (2) alone is sufficient to answer the question. A quantity that is
divisible by 5 added to another quantity, z, divisible by 5 results in a sum that is
divisible by 5. (If x and y both equal 0, then 5(x
1
y)
1
z
5
z.)