Saturday, February 18, 2012

It was just a matter of time

So it's a long weekend in the US and Canada this weekend, and as such it's easy to let your mind go a bit soft while you're away from work. I know nothing of this, of course, as I'm still unemployed. All the same, I thought I might present you, my dear readers, with a little puzzle to think over to keep your mind fresh and active.

One of the upsides about doing job interviews is occasionally being presented with a very interesting logic puzzle. Of course, most of the puzzles are really rather mundane, and even the best ones tend to be quite contrived, so I thought I might pose a puzzle to you that is in fact drawn from my daily life.

You see, I have a digital clock in my kitchen that doesn't always tell the right time. Usually it's quite accurate, but often it's mysteriously a few minutes off. If you were to observe this clock for some time, you might notice that the rightmost digit for the minutes counts quite oddly. The sequence is: 0, 1, 2, 3, 4, 9, 8, 7, 8, 9, and then back around to 0 again to do it all over.

The cause of this bizarre acalculial malfunction is deceptively simple. Can you figure out what it is?


Uncle Doug said...

Upper right vertical element is permanently on.

Nicoya said...

Nicely done, Doug!