Archive for June, 2010

A cool sequence problem…

June 15, 2010

ZipperOur oldest son (nearly 10) posed the following challenge:

What comes next in this list?

1, 1, 1, 2, 2, 3, 2, 4, 3, …

Answer and rationale (his and mine) after the jump…


Counting with 0

June 10, 2010

We’ve just painted our living room, for the first time since moving in ten years ago, and decided to celebrate the new jazzed up look by getting a new lightswitch for the porch door to replace the old, painted over one.  (Question:  Why did the previous painters think it was a good idea to paint over every light switch and every electrical outlet?)  I eventually found a place that had some pretty neat ones, but I noticed that the two pages of lightswitches [11 items, listed 6 to a page] were ordered in an unusual way:

YES — they started counting at 0.  Can you imagine how happy that made me?  Although the fact that our living room was newly painted, with 10 years of crayons and scratch marks obliterated in just  2 4 6 days of work might have also had something to do with it.