Want to amaze your friends with your ability to read their mind? This will do it! There are 6 cards with 59 or 60 different numbers. Simply ask a friend to select a number but not to tell you. Then ask him to look at each card and turn over any that do not contain the number he is thinking of. Within seconds you will be able to tell him the chosen number!
The trick is very simple: The first numbers (top left) must be added together for all selected cards.
Printing the cards: A filament change should be done at 1.8mm + one layer. this can be done with the "Change Filament At Z Cura Plugin" https://www.thingiverse.com/thing:2077884 .
I printed with Layer height: 0.15
The box must be printed in vase (spiral) mode
Top layer = 0.
Bottom thickness: 0.65 (1x 0.2 + 3x 0.15 - should differ only slightly)
Nozzle and line wtdth: 0.4
Layer height: 0.15