[Needs cleanup… just dumping here for now.] Mark Jason Dominus tweeted and later blogged about this puzzle: From the four numbers [6, 6, 5, 2], using only the binary operations [+, -, *, /], form the number 17. When he tweeted the first time, I thought about it a little bit (while walking from my […]| The Lumber Room
(I don’t have a solution yet.) I just wanted to show what the sky looks like over the course of a week. On a Mac with Stellarium installed, I ran the following with the following stellarium.ssc: It took a while (some 10–15 minutes) and created those 336 images in ~/Pictures/Stellarium/uj*, occupying a total size of […]| The Lumber Room
[incomplete: must add examples and more discussion] Most programming languages include a “remainder” or “modulo” function, and also an integer division (“quotient”) function. Given two integers and , let’s call the results of these functions and respectively. For positive and , it is clear what and should be: is the largest integer such that , […]| The Lumber Room
Found via G+, a new physical experiment that approximates $latex \pi$, like Buffon’s needle problem: The Pi Machine. Roughly, the amazing discovery of Gregory Galperin is this: When a ball of…| The Lumber Room