## Car Talk Puzzler: In Search for Bogus Coins

In Search of the Bogus Coins RAY: We have seven stacks of coins, each with 100 coins. Real coins weigh ten grams, and phony coins weigh 11 grams. We’re going to weigh the coins on an analytic scale, which works just like your average bathroom scale – but it’s accurate to within a tenth of a […]

## Math Pic: Westminster Abbey

Looking up at the ceiling of Westminster Abbey in Henry VII’s Lady Chapel. No questions, just thought it was cool.

## Robert Larson 800-2875 Center Finder

Neat: (from Make: Online) If you’ve ever struggled to locate the center of a circular plate or a piece of round stock using a ruler or a square, you know it can be a tricky proposition. But this cleverly-designed gauge from Robert Larson Woodworking Tools makes short work of the job, and does it more accurately, to […]

These awesome heating radiators were in the flat (apartment) that we stayed in. I want to make one more. How much pipe do I need to bring to the bending machine?

## Math Pics: Underground Carriages

The following is the first of a few pictures that I took while on spring break in London. This is a flyer that is talking about the improvements to the London Underground. The Summer Olympics are coming next summer, so they are trying to increase the capacity. So, how many carriages per train are there […]

What shape? Why?

## Giant Gummy Bear #WCYDWT ?

What questions come to mind? Maybe it’s because it’s the day before spring break, but I’m having trouble coming up with good stuff. Is this worthy of the #wcydwt tag? Features & specs: Dimensions: 9.5″ x 5.5″ x 3.5″ Equivalent to 1400 regular-size gummy bears Weighs approximately 5 pounds 12,600 calories! From: http://www.vat19.com/dvds/worlds-largest-gummy-bear.cfm The best question […]

## Math Photos: Cliffs of Moher

Alright, last Ireland photo for a while (p1 and p2). If O’Brien’s tower is 22 ft tall, how tall are the Cliffs of Moher? The most useful (is it?) topic in math: proportions.

## Tropicana #WCYDWT

Well? How many oranges to run an LED? A laptop? A TV? A Prius? This one is just asking for a hands on demo.

## Math Photos: Giant’s Causeway

Also found in Northern Ireland is the Giant’s Causeway, an amazing place to find basalt columns (whatever they are 😉 ) “Unreal” formation, students always say it looks fake. I’ve used these photos in the polygons angles unit for geometry, but I’m sure there are other uses.