Informed consent will occur at the initial screening visit which is to take place approximately 2 weeks prior to surgery, but no less than 10 days pre-op. At this visit, a member of the research team will obtain demographic information (gender, education level), historical medical information, and information regarding medication usage. The researcher will perform the Mini-Mental Status Exam (MMSE) - the modified version (see attached document), Self Administered Gerocognitve Form (SAGE) - all four versions (see attached questionnaires), Geriatric Depression Scale, Charlson Comorbidity Index, Postoperative Quality Recovery Scale (PQRS), and Short-form 36 Health Related Quality of Life Measure. Patients meeting inclusion criteria will be randomized to either the cognitive exercise or control group. Patients in the cognitive exercise group will be given a tablet with preinstalled access to Lumosity (Lumos Labs, San Francisco, CA, USA), a cognitive exercise software application which will be used in this study. Each participant in the cognitive exercise group will be expected to complete 1 hour of Lumosity brain exercise daily for a minimum of 10 days prior to surgery, equaling an effective 'dose' at least 10 hours. Playing time will be determined either by: (a) the actual in-game playing time; or (b) as calculated by the research team during the Screening Visit (see the "Subject Diary"). The Lumosity software allows for monitoring of participant compliance by researchers. Patients in the control group will carry out their normal activities prior to surgery.