GMAT Quantitative Reasoning Practice Test 3

Since $\mathit{X}$ is a fraction between 0 and 1 , the smallest answer will be that of the highest power, since all the answers are positive. Therefore, ${\mathit{X}}^3$ is the smallest possible. Pay attention to answer ${\left(\mathit{X}-1\right)}^2$, it's the same as ${\mathit{X}}^2$; it's a fraction between 0 and 1 squared.