I am told that these signs are appearing around San Francisco — thank you, Doug Marquis! — offering either an open-ended or a traditional problem to give your math students. Pick one: What do you notice? How far is the… Read More ›

# Math

## What difference could a few zeroes make? Zero is nothing, isn’t it?

Bloomberg spent $500 million on ads. The U.S. population is 327 million. He could have given each American $1 million check and still have money left over. I feel like a $1 million check would be life-changing for most people…. Read More ›

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*Mathematics Galore!*

The aims of a mathematics masterclass and of this book are to enthuse educate inspire challenge audiences of young people, their parents and teachers, with the wonder, excitement, power, beauty, and relevance of modern mathematical ideas. So it says in… Read More ›

## Iowa and Ireland: election math

What happened in Iowa? Well, we don’t really know for sure how Mayor Pete managed to astonish everyone, but that’s not what I’m writing about here. And what does it have to do with Ireland anyway? The issue is one… Read More ›

## 366 days of math

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 ›

## 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?

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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 ›