2 We throw a coin

by baily

3 Re: Pythagorea

by baily

4 Legible lines

by Serge

5 Pythagorea

by

6 Magic age

by AlexGin

8 Problem on

by Vain

9 Such here the task

by Kaifa

12 Re: a tendency, however!

by Maniacal

13 Re: three

by Ejnstok Fajr

15 Triangle from stick slices

by rg45 ( Pages 1 2 )

16 QR-code

by Erop ( Pages 1 2 3 )

17 Fruit

by anonymous

18 All shades of the white.

by NovaMind

23 Cool problem

by bzig

25 Parameters

by Serge

29 Swap

by Titus