- The slides: As used during the workshop (with all pauses) and One page per slide (no pauses); also, a PDF with just the questions
- The lecture notes of the course Kaleidoscope
- A blog post on the `mathematical' problem of the strange addition (in English)
- A
blog post
on the problem of comparing 1000
^{1001}and 1001^{1000}(in Dutch) - An
article
in the math journal Pythagoras
about the `blind date' problem
(in Dutch);

Here is the actual question on the`wisfaq`website

K_dot_P_dot_Hart_at_TUDelft_dot_nl Last modified: Friday 24-11-2017 at 15:02:07 (CET)