Monthly Archives: April 2016

Puzzle #151: More Money

You have some ninety-odd dollars on you. It is in the form of 20-, 10-, and 5-dollar bills; toonies (Canadian $2 coin); loonies (Canadian $1 coin); quarters; dimes; and nickels. There is a different, odd number of each bill (from 1, 3, and 5) and the same for the coins (but from 1, 3, 5, 7, 9). The total amount of money is evenly divisible by 25 cents. The number of nickels is the same as the number of one of the bills; the same is true about the number of dimes. There are not nine quarters. Lastly, if you had $99 or more, you would probably just say that you had about $100, and so would I.

How money do you have?

Submit your answer to Gene Wirchenko <genew@telus.net>. Your answer should be in the form of a proof. That means to show how your answer must be correct. The deadline is Wednesday, April 27, 2016 at noon Pacific Time. I will post the answer shortly after.

Puzzle #149 Solution: Another Murder

Spoiler Inside: Solution to Puzzle SelectShow

The Worldwide Web and the Baling Wire Model

When something is jerry-rigged (or jury-rigged or — I may have an Odd Language item here!) or held together with baling wire (or chewing gum), it means that it works, sort of, somewhat. This should not be confused with solid engineering.

An awful lot of the Web (A lot of the awful Web …?) works this way. For something that is so widely used by so many, it is still somewhat amazing to me how much digital baling wire and chewing gum there is.

“If builders built buildings the way programmers wrote programs, then the first woodpecker that came along would destroy civilization.” — Gerald Weinberg

There are too many cases of sites just not working for me or ones that are subverted to serve up malware.

What are you doing to make reliable things in your area of expertise?

Odd Language #147: Fine Tea

From a post in the eternal-september.talk USENET newsgroup: “An annoying facet of trying to google for finely ground tea is …”

The issue: ‘… naturally that “fine tea” might just mean “high quality tea but not tiny leaf bits”.’

Puzzle #150: Change

Using loonies, quarters, dimes, and nickels, how many ways can one assemble exactly one dollar in change?

Submit your answer to Gene Wirchenko <genew@telus.net>. Your answer should be in the form of a proof. That means to show how your answer must be correct. The deadline is Wednesday, April 20, 2016 at noon Pacific Time. I will post the answer shortly after.

Puzzle #148 Solution: Reading in the Dark

Spoiler Inside: Solution to Puzzle SelectShow