Correct. $\displaystyle\frac{{10}}{{2}}\usepackage{cmbright}\Huge\$ can be written as 5, so this number belongs to all three sets. Similarly, $\displaystyle\frac{{0}}{{1}}\usepackage{cmbright}\Huge\$ is equivalent to 0, so it belongs in the whole number and integer sets. $\displaystyle-\frac{{6}}{{3}}\usepackage{cmbright}\Huge\$ is the same as the integer -2.