Challenge: Generate a 64 in the display (RPN)

[Gerson W. Barbosa]

(09-02-2020 11:09 PM)Valentin Albillo Wrote:  

(09-02-2020 10:56 PM)Gerson W. Barbosa Wrote:  Yes, the “Classics” encompass only the HP-35, HP-80, HP-45, HP-65, HP-70 and HP-55.

Are you implying that the HP-25 isn't a classic !!?? C'mon, Gerson !

I consider even the more recent HP-15C, my first one, a Classic. The above is the curator’s definition.

Best regards,

Gerson.