Pleah.  5 pages would be about four more than I could stand; I am more of a modernist when it comes to literature.  Seriously, though, the jury is still out on whether exercising the noggin staves off dementia.  Some studies say it can actually accelerate mental decline once Alzheimer's sets in.

That said, reading great books,  learning a second language, playing a musical instrument, doing mathematics.......all of these and more are a real boost to the grey matter and a durn good idea whether you fear mental decline or not.  I plan to exercise my brain at least as much as my body when I retire.......