## Articles

- The Smith report: Making mathematics count
- Quadratic equations in Parliament!
- New look for Nrich - Our sister site Nrich unveils its new site design.

*Plus*, Marcus du Sautoy continues his exploration of the greatest unsolved problem of mathematics: The

**Riemann Hypothesis**.

**computers' weaknesses**.

**Calculus**is a collection of tools, such as differentiation and integration, for solving problems in mathematics which involve "rates of change" and "areas". In the second of two articles aimed specially at students meeting calculus for the first time, Chris Sangwin tells us how to move on from first principles to differentiation as we know and love it!

**information theory**to explain how to cut down the number of tests significantly, by pooling samples of blood.