Aptitude tests are generally not scored on a pass-fail basis. They are used to gauge different abilities and personality traits compared to others who have taken the test.
For that reason, it is great to prepare and put your best foot forward, but if you do not get the score you were aiming for, don't be discouraged. Different companies are looking for different strengths.
An aptitude test can also be used to tell if a company is a good fit for your skills and personality. Ultimately hiring the right person for the right job is best for both the employer and the employee.