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If you enjoy software engineering, math, geometry and travel, you may find these puzzles interesting. These are not the kind of problems we solve for work, but we do them for fun and they give our brains exercises that they need :-)
If you like them, we'd like to invite you to consider joining us. If your talents happen to be in a different area, that's ok too, since we have many job openings and we'd still like you to consider joining us!
- What does the following sequence of operations do? ("a" and "b" are integers)
a = a XOR b;
b = a XOR b;
a = a XOR b;
- Lufthansa flight 458 flies from Munich, Germany to San Francisco, USA. It leaves Munich at around 4pm local time, and arrives in San Francisco at about 7pm local time on the same day.
Normally, when you fly from east to west, you "follow the sun" and the sun sets very slowly over the 12-hour flight. However, when I took the flight last December, it started out in daylight, then it got dark quickly, then I saw daylight again, and then it got dark again before arrival.
How do you explain this phenomenon?
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If you cut a piece of paper into 6 connected squares, sometimes it can be folded into a box (see Figures A and B below), but sometimes it cannot (see Figure C). How do you write a computer program to enumerate all patterns that can be folded into a box?
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