To get the password in the Study, tap on Grandma’s Ledger. Two types of items will drop: Stamps and, occasionally, Ledger pages.
Half a Password
Obtain Strange Notes and sink a Stamp #8 and Stamp #16 into it to get a Prototype Punch Card.
Obtain Confusing Scribbles and sink a Stamp #32 and Stamp #64 into it to get an Alpha Punch Card.
Sink the Prototype Punch Card into the Alpha Punch Card to get Half a Password.
The Other Half
Obtain Nonsensical Musings and sink a Stamp #64 and Stamp #512 into itto get a Beta Punch Card.
Obtain Illogical Conclusions and sink a Stamp #512 and Stamp #256 into it to get a Gold Punch Card.
Sink the Beta Punch Card into the Gold Punch Card to get The Other Half.
Complete Password
Obtain Shady Numbers and sink a Stamp #256 and two Stamps #512 into it to get the Important Page.
Sink Half a Password and The Other Half into the Cryptic Writings to get the Computer Password.
Now you can discover grandma’s secrets!