Win a New Martin Gardner Book – Final Award

Thanks for all the fun entries! The past few weeks have been entertaining, to say the least.
I saved one of my favorites, and one of the more tricky problems, for last. It’s not the simplest to set up mathematically, but can be solved intuitively.

Last week’s problem:
Hole in the Sphere
A cylindrical hole 6-inches long has been [...]

Win a New Martin Gardner Book #6

Last chance!
You guys rock–it makes me sad that I don’t have enough spare copies to give to the great entries I’ve been getting. I will be back momentarily with this week’s puzzle. First:
Four bugs sit 10 inches apart in a square. They move toward each other, forming a logarithmic spiral.
How far do they move until [...]

Win a New Martin Gardner Book #5

October 1, 2008

For this week’s contest, click here!
Hello, Leiter Reports! I’m very glad that I have a couple philosophy degrees, because the conditional logic that you guys threw my way … well, wasn’t too complicated per se, I just don’t see much of it during a regular work day! That wasn’t supposed to rhyme.
Anywho, I’m [...]

Win a New Martin Gardner Book #4

September 24, 2008

[Update] This week is over! The winner, and the current contest, will be announced here.
Today, we’ll start on the puzzles from Hexaflexagons, Probability Paradoxes, and the Tower of Hanoi. I’ll run three; that’s three more weeks of puzzle goodness.
Incidentally, don’t miss Don Albers’ lengthy interview with Gardner, updated weekly.
Last week: the final [...]

Win a New Martin Gardner Book #3

Welcome back!
Go to the current contest here >>
The entries are really coming in. Thanks to everyone for entering!
Also, check out the interview with Gardner that I’ll be posting over the next few weeks.
Last week’s question asked how many planes, re-fueling in midair, are required for one circumnavigation, assuming that a full tank=1/2 the trip, and [...]