Riddler Express, July 24 2020

Got the Classic from two weeks ago correct, although I hadn’t got the closed-form solution; I needed to spend more time playing with toy examples, but I’m not sure I would have discerned the pattern anyway. It’s neat though.

This week’s Express is not too difficult (please don’t let me get it wrong!). The thing that surprised me on thinking about it is that the total number of combinations of shires is only 1024. That’s  210, since there are 10 shires, each of which can be in or out of any particular subset.

Half of the possibles combinations of shires don’t have enough votes to win, and of those combinations that do, many of them could lose a shire and still win, so they can be ignored as well.

My 33 lines of code will print out an answer in about a millisecond. I assume in Haskell it could be done in about four lines! I should take a look at that language sometime.

Riddler Express, June 26 2020

Simple question for this one:

In Riddler City, the city streets follow a grid layout, running north-south and east-west. You’re driving north when you decide to play a little game. Every time you reach an intersection, you randomly turn left or right, each with a 50 percent chance.

After driving through 10 intersections, what is the probability that you are still driving north?

Read more

Managing External Work

Someone asked me recently about managing outsourced piecework, where people outside your company are paid by the number of tasks performed. I did this on various projects for over a year with a previous employer. Our trial-and-error approach had quite a few errors, but we did eventually establish a stable system. This is an outline of that successful system, with a few notes about things we tried that didn’t work.

Read more

Riddler, May 15 2020

Since I’m still learning my way through Jupyter, I tried the Classic as a notebook.

I’m also not sure what the best way to present a notebook is, if I have a WordPress site? The include I used last time wasn’t that great.

For the Express, the best score I can manage is 6. In this grid, there’s no legal place to put a 1 in the top row.

So you’re going to be a Penalty Box Timer?

A couple of weeks ago I worked as a penalty box timer for the Fab Slav roller derby sevens tournament. If you don’t know what roller derby is, this post is not for you. Instead, you should find out!
 
This post is about what I learned of penalty box timing after doing it for the first time. It’s not a substitute for reading the WFTDA docs, being familiar with the sheets you’ll fill in, watching Brain of Terror’s videos, or taking any training that is offered to you.

Read more