And since I started posting pictures anyway, here is the window in my parents’ living-room. As you can see, my mother doesn’t have the same problems with decorating as I do:

And here is a riddle from my mother that I didn’t manage to solve. She is a math teacher but she didn’t manage to pass her mathematical capacities to me.

The riddle: There is a 12-story building. Two people live on the first floor, and then each floor has twice as many residents as the preceding floor. Which button gets pressed most often in the building’s elevator?