Prime VS 48SX VS 42S/DM42/Free42

[Dave Britten]

(01-15-2021 12:41 PM)fs5qc Wrote:  Yes,
Do you know a non programmable calculator with rpn ?
I think the 35S is the one.

Hmm, non-programmable RPN... The 35S is programmable, so that rules it out. Maybe the 17BII, but it's not scientific, and the solver is sophisticated enough that it could be considered programmable.

I believe all HP RPN calculators since the 41C and Voyagers are programmable. You would probably have to go way back and get a 35, 45, 21, 31E, or 32E, with the 45 usually being the most affordable of those. All still excellent choices, of course! But I would be surprised if the exam board includes such old models in their list of allowed calculators.

If you're willing - or forced - to forego RPN, then the Casio fx-991EX, TI 36X Pro, and TI 30X Pro are all good, inexpensive options.