## Search results

1. ### Maths in a minute: negative numbers

... us too. Suppose you're standing at the point 0, facing in the positive direction of the number line. You take two steps backwards and ... together gives (-2)x(-4)=8. Maths in a minute: negative numbers Permalink Submitted ...

Marianne - 11 Oct 2016 - 15:33 - 3 comments

2. ### Maths in a minute: Arrow's theorem

Is there a perfect voting system? In the 1950s the economist Kenneth Arrow asked ... Prize in Economics. You can find out more about the maths of voting in these Plus articles. ...

Marianne - 22 Feb 2017 - 17:24 - 1 comment

3. ### News from the world of maths: Maths in a minute

Wednesday, February 17, 2010 Maths in a minute — Achilles and the tortoise Achilles and a tortoise ...

4. ### Maths in a minute: The square root of 2 is irrational

... numbers. Here’s one of the most elegant proofs in the history of maths. It shows that is an irrational number, in other words, that it cannot ...

Marianne - 5 Dec 2016 - 10:10 - 2 comments

5. ### Maths in a minute: Boolean algebra

A B A AND B True True True True ... after the English mathematician George Boole (1815 - 1864). In Boolean logic statements can either be true or false (e.g. at the moment "I ... values the compound statement can take. (You can read more in George Boole and the wonderful world of 0s and 1s .) Truth ...

Rachel - 11 Oct 2016 - 15:26 - 1 comment

6. ### Maths in a minute: St Paul's dome

... it hides an intriguing example of the interplay between maths and architecture. Seen from the outside, the building is crowned by a ... science being used as part of the design process. In 1675 Hooke published the anagram Ut pendet continuum flexile, sic stabit ...

Rachel - 23 Nov 2016 - 10:01 - 0 comments

7. ### Maths in a minute: Simplifying circuits

... – AND, OR and NOT – can be physically represented in the computer circuits and mathematically representation using Boolean algebra . (You can read more in Maths in a minute: Boolean algebra .) This realisation of the links between ...

Rachel - 11 Oct 2016 - 15:27 - 0 comments

8. ### Maths in a minute: The catenary

When you suspend a chain from two hooks and let it hang naturally under its own weight, the ... hanging chain will naturally find this equilibrium shape, in which the forces of tension (coming from the hooks holding the chain up) and ... turns out that it's the most stable shape an arch can have. In a hanging chain the forces of tension all act along the line of the curve. ...

Marianne - 22 Dec 2016 - 11:27 - 4 comments

9. ### Maths in a minute: Counting numbers

... out, however, that the set of rational numbers is infinite in a very different way from the set of irrational numbers. As we saw ... insanity: http://lesliegreen.byethost3.com/articles/new_maths.pdf reply ...

Marianne - 13 Dec 2016 - 15:33 - 3 comments

10. ### Maths in a minute: Euclid's fourth axiom

... for example, that through any two points there is a straight line. The fourth one, however, sounds a bit weird. It says: ... fact when we consider that he didn't describe right angles in terms of degrees or any other angle measure (he didn't have one). Instead, ...

Marianne - 16 Dec 2016 - 13:53 - 3 comments