I fixed a glitch in the markup for one question and corrected an error – \(\sqrt{5}\) is approximately \(2.24\), not \(2.25\).
I also enabled randomly arranged answers. This is standard on the GMAT, but it introduces a new layer of difficulty in terms of recognition. Now you can’t scans the answers in order until the correct one jumps out. Of course you can still do POE (process of elimination), but the payoff for “just knowing” will be even greater.