Resources tagged with: Rational and irrational numbers

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There are 10 NRICH Mathematical resources connected to Rational and irrational numbers, you may find related items under The Number System and Place Value.

Broad Topics > The Number System and Place Value > Rational and irrational numbers

Repetitiously

Age 14 to 16
Challenge Level

Can you express every recurring decimal as a fraction?

An Introduction to Irrational Numbers

Age 14 to 18

Tim Rowland introduces irrational numbers

The Square Hole

Age 14 to 16
Challenge Level

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

Equal Equilateral Triangles

Age 14 to 16
Challenge Level

Can you make a regular hexagon from yellow triangles the same size as a regular hexagon made from green triangles ?

What Are Numbers?

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.

An Introduction to Proof by Contradiction

Age 14 to 18

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

The Dangerous Ratio

Age 11 to 14

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

All Is Number

Age 7 to 14

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

Making Rectangles, Making Squares

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?

Rationals Between...

Age 14 to 16
Challenge Level

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