> Imagine a horizontal line. The very left is marked one thousand and the very right is marked one billion. On this line, where would you add a marker to represent one million?<p>> If you said somewhere in the middle, you answered the same as the roughly 50 percent of people who have done this exercise in a number line study. But the answer is actually much closer to one thousand since there are one thousand millions in one billion.<p>...AND yet another reminder that I stopped listening (& donating) to NPR for good reasons. They are writing a story about math, with at least 4 people involved and named - including a "fact checker" - but none of 'em seems to have any clue about logarithmic scales on graphs & such.