Maths Terms for 11-13 Yr Olds

Data resulting from measurements taken on a discrete variable, i.e. one that can't be divided up into infinitely small parts (examples: value of coins in pupils’ pockets; number of peas in a pod).

Discrete data may be grouped. Example: Having collected the shoe sizes of pupils in the school, the data might be grouped into ’number of pupils with shoe sizes 3, 5, 6, 8, 9, 11, etc.

The property of being divisible by a given number. Example: A test of divisibility by 9 checks if a number can be divided by 9 with no remainder.

1. An operation on numbers interpreted in a number of ways. Division can be sharing - the number to be divided is shared equally into the stated number of parts; or grouping - the number of groups of a given size is found. Division is the inverse operation to multiplication.

2. On a geometric scale, one part. Example: Each division on a ruler might represent a millimetre.

A polyhedron with twelve faces. The faces of a regular dodecahedron are regular pentagons. A dodecahedron has 20 vertices and 30 edges.