# Test: Arithmetic IV - Challenging

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Question 1:   Calculate: $\frac{3}{7}:\frac{1}{4}$
$1\frac{5}{7}$
$2\frac{4}{7}$ 
$\frac{3}{28}$
$\frac{5}{7}$
Question 2:   Calculate: $7-4\frac{1}{8}$
$2\frac{1}{8}$
$2\frac{7}{8}$
$1\frac{1}{8}$
$3\frac{1}{8}$
Question 3:   Find the greatest common divisor of $\left(18,45\right)$
$9$
$3$
$6$
$5$
Question 4:   Find the least common multiple of $\left(18,45\right)$
$9$
$90$
$45$
$18$
Question 5:   Calculate: ${\left(\frac{2}{3}\right)}^{3}\left(7\frac{1}{2}-\frac{1}{6}\right)$
$2\frac{1}{6}$
$2\frac{14}{81}$
$\frac{1}{6}$
$\frac{14}{81}$
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