Puzzle #51: Critters

Welcome to the zoo!

There are critters with zero legs, two legs, four legs, and fifty legs. Hug a caterpillar today (but not too tightly).

There is at least one critter with each number of legs. The more legs, the more of those critters, and vice versa. The total number of critter legs is 600.

What is the maximum number of critters in the zoo?

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, May 28, 2014 at noon Pacific Time. I will post the answer shortly after.

Evaluating Competence

Are you good at ? If you are, then you stand a good chance of being able to tell if another person is good at .

What if you are not good at ? How do you tell?

There are stories of people getting jobs in IT who had little, if any, compentence in the area, but because they managed to snow management, they had jobs for quite a while. I expect this is true in other areas as well.

How do you detect whether someone is competent in an area you are not competent in yourself?

Odd Language #47: Misused(?) Terms

What do these terms have in common? Phone number, cellular phone, dialing a phone number, comic book, comic strip, comics, soap opera.

The issue: The terms might have originally been accurate, but now, they often or usually are not.

A phone number is not a number. What people call a cellular phone might not be one, but just a type of mobile phone. One does not dial on most modern phones; one presses buttons. Comics need not be comic. Soap operas are no longer sponsored by soap companies.

Puzzle #50: Puppies!

After last week’s kitten puzzle, puppies are now whining for their turn. (See http://tvtropes.org, and search for “precious with puppies”.)

Ah, yes. They each are in one of three colours: black, brown, and white. (Black puppies are even worse than black kittens if you claim black is not a colour.) Naturally, the puppies are either male or female. There is at least one puppy of each of the six colour-sex combinations.

There are fewer than 20 puppies. The number is prime and so is the number of males. There are three more males than females, or maybe, it is the other way around. For each sex, there is a different number of puppies of each of the three colours. For each colour, there is a different number of puppies of each sex. There is a mob of seven brown females. The only white, male puppy is really really cute. There are fewer than ten puppies of each colour.

So how many puppies of each colour-sex combination?

Submit your answer to Gene Wirchenko &lt;genew@telus.net&gt;. Your answer should be in the form of a proof. That means to show how your answer must be correct. <strong>The deadline is Wednesday, May 21, 2014 at noon Pacific Time.</strong> I will post the answer shortly after.