# Are you rational

Number Theory Level 2

$\begin{array} {l l l l l } 0, & 1, & \frac{2}{3}, & \frac{ 1.2}{3.4}, & \frac{5}{6} + \frac{7}{8}, \\ \sqrt{10}, & \sqrt{16}, & \pi, & \frac{\pi}{\pi + \pi}, & \sqrt{ 1+ \frac{5}{4} } \end{array}$

How many of the above 10 numbers are rational?

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