Alex Bellos Monday Puzzles

Discuss all puzzle-related subject here

Alex Bellos Monday Puzzles

Postby detuned » Mon 20 Jul, 2015 7:00 pm

Came across this at work today:

http://www.theguardian.com/science/seri ... day-puzzle

The family planning exercise woefully exposed just how rusty my analysis ability was (i.e. show that the sum from n=0 to infinity of n / 2^(n+1) is 1 - although also note you can argue this from a purely probabilistic point of view much more easily) - but have a look at Hidato as well.
detuned
 
Posts: 1517
Joined: Mon 21 Jun, 2010 2:25 pm
Location: London, UK

Re: Alex Bellos Monday Puzzles

Postby PuzzleScot » Tue 21 Jul, 2015 12:35 pm

Hang on - someone's making money from solving puzzles?? Anyway...

The family planning one is the gender-reversed version of the Chinese 1-child-system problem:
Chinese families were only permitted to have one child, to stem the population explosion.
However, farming families said they needed a son to take over the business.
So an exception was made - In rural communities, you could keep having children, if they were female, until the first male was born.
What effect did this have on the rural gender balance?

I do like these counter-intuitive problems. Thanks.

The Hidato wasn't so bad. I have often thought we should have a video series of our own explaining how to solve each of the common types - a video version of the walkthroughs on here.
PuzzleScot
Site Admin
 
Posts: 2609
Joined: Fri 18 Jun, 2010 10:45 pm
Location: Edinburgh, Scotland

Re: Alex Bellos Monday Puzzles

Postby detuned » Tue 04 Aug, 2015 10:30 pm

Definitely worth sharing Monday's post - Area Maze is a lovely idea!

http://www.theguardian.com/science/2015 ... choolchild
detuned
 
Posts: 1517
Joined: Mon 21 Jun, 2010 2:25 pm
Location: London, UK


Return to General Puzzle Discussions

Who is online

Users browsing this forum: No registered users and 1 guest

cron