Do you find some mathematical activities useless?

[Valentin Albillo]

(04-25-2018 08:58 PM)Egan Ford Wrote:  I could say this for every single one of your challenges. Time very well spent. Thank you for "some mathematical activities" that some may deem "useless".

You're welcome, thanks to you for your kind comments and interest in my challenges. I still fondly remember your outstanding contributions to my Short & Sweet Math Challenge #20 "Oh, So Easy", most especially the part dealing with Göbel-like sequences, which you extensively worked out despite being extremely busy with professional and personal matters.

Best regards.
V.
.