You definitely want 366 days of math. Check it out as we are about to enter a new year! The American Mathematical Society offers us a page-a-day desk calendar, in the usual form factor, with a mathematical tidbit for each day… Read More ›

# Math

## Every vote counts!

How do elections work? Does your vote really count? Could your single vote really make a difference? See below. But first… Regular readers of this blog know that I teach a course every summer to rising tenth-graders where one unit is… Read More ›

## A negative decrease?

Hmm… so I guess that means that my score increased?

##
Election Math: A British approach from *Plus Magazine*

As you know, Hillary Clinton received more votes than Donald Trump in 2016, which is why she is president today. What? You say that isn’t true? But she really did get more votes — and we live in a democracy,… Read More ›

## Wedding follow-up: Why is this ratio so strange?

A couple of mathematical follow-ups to my recent post about my niece’s wedding: Wedding favors are a standard perk; in this case we received tote bags hand-made by the bride. But there was a mathematical twist to the posted sign:… Read More ›

## Graphing calculator prices: how TI cornered the market

You’re a student. Why are you required to buy a Texas Instruments calculator? Why not something cheaper and better? Usually what you’re buying is a TI-84, a 15-year-old piece of expensive technology. Zachary Crockett explains how we got into this… Read More ›

## “America’s math curriculum doesn’t add up,” observes Steve Levitt.

Please listen to (or read) this week’s Freakonomics podcast. I will wait. No, actually, I’m going to discuss it without making any prior assumptions that you have listened to it or read it: If you’ve been reading this blog for… Read More ›

## Diversity and majorities in Boston elections

Boston just had a preliminary election yesterday (more or less what other places call a primary, though it’s non-partisan). As you know from my post of September 22, one of the topics that I teach in my Quantitative Reasoning class is… Read More ›

## What is “quantitative reasoning”?

If you read this blog regularly, you know that I teach a course with the strange title of “Quantitative Reasoning.” What does that mean? I’ll describe the course in general, followed by specifics of all four units. Generally referred to… Read More ›

## Jiffy? Centijiffy? Decijiffy?

“I’ll be with you in a jiffy.” How long is a jiffy? What about a centijiffy? Before we get to the urgent question of how long a jiffy is, I want to comment on a surprising error (or is it… Read More ›