1. When the integer n is divided by 6, the remainder is 3, which of the following is not a multiple of 6?
a) n – 3
b) n + 3
c) 2n
d) 3n

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2. Find the value of $\frac{1}{\sqrt{5}}\left [ \left ( \frac{1+\sqrt{5}}{2} \right ) - \left ( \frac{1-\sqrt{5}}{2} \right ) \right ]$
a) $\sqrt{5}$
b) 2$\sqrt{5}$
c) 5
d) 1

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