Matchstick Puzzler: 16 – 90 Degree Angles
October 6, 2012, 12:00 amNew puzzler from Cartalk:
How do you make 16 ninety-degree angles out of 4 matchsticks?
Bret Victor’s Learnable Programming
September 27, 2012, 12:00 amBret Victor (Inventing on Principle) wrote an excellent essay on Learnable Programming. If you have any interest in how people learn computer programming best, or how people learn in general, then go read it. Now. Shoo. And you probably want to read it on a computer; there are several short vid...
Batting Averages Puzzler
September 22, 2012, 12:00 amFrom the soon to be retiring Car Talk radio show, a fantastic new baseball puzzler.
RAY: As you might guess, I’m a baseball fan. And now that the season is in its waning days, I thought I’d use this baseball Puzzler I’ve been saving.
There are two rookie players, Bluto and Popeye, who started...
Shadow Art
September 18, 2012, 12:00 am
iPads save Jetfuel
September 11, 2012, 12:00 amFrom paritynews:
American Airlines has announced that it has received the permission from FAA to allow its pilots to carry and use iPads in the cockpit during “all phases of flight.”
According to the airlines, the tablet will enable pilots to store documentation in electronic form on the iPa...
180 Days – Classroom Photoblog
September 7, 2012, 12:00 amSo I’ve joined the ranks of the 180 day classroom photo-blog (ugh, hate that word) in hopes of keeping up on reflection in this very busy year. And here’s a Google Reader bundle of a whole bunch of 180 blogs compiled by Frank Noschese. Cheers.
Nickels
August 31, 2012, 12:00 am
First Day Activity: Puzzlers
August 30, 2012, 12:00 amOn the first day of class in AP Calculus and Pre-Calculus Honors I’ll give out the following list of puzzlers that they’ll have a limited amount of time to work on. The students will be working in groups on the new $2 interactive whiteboards.
Btw, I still haven’t...
Chipotle Math
August 30, 2012, 12:00 amFrom the consumerist:
On the first, dated July 13, the nine items added up to $32.93. There was $2.31 in tax. The total should have been $35.24, but next to the “total” line on the receipt, it said $35.25.
The next receipt, with the same sale date, showed a subtotal of $8.64. The tax was $0....
Intelligently Cracking Passwords
August 24, 2012, 12:00 amFrom Ars:
One promising technique is to use programs such as the open-source Passpal to reduce cracking time by identifying patterns exhibited in a statistically significant percentage of intercepted passwords. For example, as noted above, many website users have a propensity to append years t...