1. Little calculation imprecision of 53% (2007-09-26)
2. Lethal Numbers 1 (2007-11-14)
3. Variable loyalty points (2007-11-15)
4. Fractal thongs are a biohazard (2007-12-19)
5. Links of the Week (2008/01) (2008-01-05)
6. Links of the Week – Special Edition (2008/04) (2008-01-27)
7. Links of the Week (2008/09) (2008-03-02)
8. All your days are belong to us! (2008-03-13)
9. Happy Pi Day! (2008-03-14)
10. Links of the Week (2008/11) (2008-03-16)
11. Nichts besseres zu bloggen? (2008-03-20)
12. Cuddle song hampers percentages – or something like that… (2008-03-28)
13. Cheating was never easier… (2008-04-11)
14. Percentage calculation problems or The shrunken bodies (2008-07-21)
15. The perfect post (2008-11-22)
16. Calculating weekdays in your head (2009-01-05)
17. Links of the Week (2009/03) (2009-01-18)
18. What’s the weight of the packaging? (2009-02-27)
19. Links and Video of the Week (2009/15) (2009-04-12)
20. Projekt 52/26: Math around you (2009-06-29)
21. In the past (2009-12-22)
22. Links of the Week (2010/5+6) (2010-02-14)
23. Links and Videos of the Week (2010/35+36) (2010-09-12)
24. Links and Videos of the Week (2010/37) (2010-09-19)
25. Links and Video of the Week (2011/10) (2011-03-13)
26. Projekt 52: Magic with Numbers, Flashlight Art (2011-11-03)
27. Video of the Week (2012/13) (2012-04-01)
28. Video of the Week (2012/27-29) (2012-07-22)