# Resources tagged with: Rational and irrational numbers

### There are 10 results

Broad Topics >

Numbers and the Number System > Rational and irrational numbers

##### Age 14 to 16 Challenge Level:

What fractions can you find between the square roots of 65 and 67?

##### Age 14 to 16 Challenge Level:

Using the interactivity, can you make a regular hexagon from yellow triangles the same size as a regular hexagon made from green triangles ?

##### Age 14 to 16 Challenge Level:

If the yellow equilateral triangle is taken as the unit for area,
what size is the hole ?

##### Age 7 to 18

Ranging from kindergarten mathematics to the fringe of research
this informal article paints the big picture of number in a non
technical way suitable for primary teachers and older students.

##### Age 11 to 14 Challenge Level:

The number 2.525252525252.... can be written as a fraction. What is
the sum of the denominator and numerator?

##### Age 7 to 14

Read all about Pythagoras' mathematical discoveries in this article written for students.

##### Age 11 to 14

This article for pupils and teachers looks at a number that even the great mathematician, Pythagoras, found terrifying.

##### Age 14 to 18

An introduction to proof by contradiction, a powerful method of mathematical proof.

##### Age 14 to 18

Tim Rowland introduces irrational numbers

##### Age 11 to 14 Challenge Level:

How many differently shaped rectangles can you build using these equilateral and isosceles triangles? Can you make a square?