I have always been fascinated with "tricky" problems

DadPuzzles12/19/08 0 comments

The air is rare

...the question came up about the relationship between air pressure and altitude.

DadPuzzles12/30/06 0 comments

Population Paradox

Everyone has 2 parents, 4 grandparents, 8 great grandparents, and so on.

DadPuzzles04/13/06 2 comments

Combining Golfers

This is an example of math cropping up in everyday life.

DadPuzzles01/29/06 7 comments

Spherical geometry

Say that you randomly choose three points on a sphere.

DadPuzzles11/07/05 1 comments

Computer Train 2

"Can we get to Convent in 30 minutes, or would it make sense to try for another station closer to here?"

DadConnections/News/Observations/Puzzles07/24/05 3 comments

Computer Train

So we got to wondering: what is a fair fare for train service.

DadIdeas/Observations/Puzzles/Questions07/24/05 5 comments


You are set in front of a table with two envelopes on it.

DadPuzzles01/08/05 6 comments

Got any duck food?

How many ducks get away from perfectly accurate hunters?

DadPuzzles01/05/05 6 comments

Asking an embarrassing question

The first ... problem in the book concerns a psychologist trying to gather data on the percentage of people performing some embarrassing private act.

DadPuzzles12/30/04 5 comments

Thar she blows

I know from past experience that you can't just leave the cover loose because the wind blows it off.

DadConnections/Puzzles/Questions12/09/04 5 comments

The Puzzle Instinct

I have been reading the book _The Puzzle Instinct_, by Marcel Danesi, which was a birthday gift from my childhood friend, Kaz.

DadPuzzles01/31/04 3 comments

What’d the quick brown fox do?

Mark Simonson has brought us a pangram machine. A pangram is a sentence that contains every letter of the English alphabet.

DanPuzzles01/21/04 57 comments

Caesar’s Last Breath

What are the chances you just inhaled a molecule which Caesar exhaled in his dying breath?

DadPuzzles01/02/04 5 comments

Fuel Guages

Ever wonder about measuring the amount of fuel in a cylindrical tank mounted sideways? I think about it sometimes while...

DadObservations/Puzzles10/23/03 2 comments


Ambigrams (meaning “both” and “words”) are words that can be read in more than one way - usually they are...

DavidPuzzles10/01/03 6 comments

Let’s make a deal

Say you're on a game show and given a choice of three doors.

DadPuzzles09/07/03 14 comments

Ask Marilyn

trying to write a 100 word paragraph without repeating a word.

DadPuzzles09/07/03 7 comments

Bowling with Archimedes

Out in the lake, I drop the bowling ball overboard.

DadPuzzles08/03/03 6 comments

Clocks and power failures

As you know, David emplys “bell ringers” in his teaching of science. Bell ringers are little puzzles given before class...

DadPuzzles08/03/03 2 comments

Blowing up a balloon II

Remember this entry that nobody answered? I decided to answer it. I would have done it sooner, except I had...

DadPuzzles06/08/03 0 comments

Rube Goldberg Reality?

Have a look at this commercial from Honda cars called “The Cog”. It’s got an amazing Rube Goldberg contraption in...

DavidPuzzles05/14/03 10 comments

Blowing up a balloon

Everybody has had the experience of blowing up a balloon. At first, it’s very hard. Depending on the size of...

DadPuzzles03/08/03 2 comments

Flash Mind-Reader

Check out this cool site: Flash Mind-Reader Even after you “figure it out” it’s still cool!...

PatrickPuzzles/Recommendations03/03/03 3 comments