Search

problem

Making Shapes

5 to 7

Arrange any number of counters from these 18 on the grid to make a rectangle. What numbers of counters make rectangles? How many different rectangles can you make with each number of counters?

problem

Favourite

Turning

5 to 7

Use your mouse to move the red and green parts of this disc. Can you make images which show the turnings described?

problem

Tea Cups

7 to 14

Place the 16 different combinations of cup/saucer in this 4 by 4 arrangement so that no row or column contains more than one cup or saucer of the same colour.

Excel Interactive Resource: Remainder

page

Excel Interactive Resource: Remainder

Use an interactive Excel spreadsheet to investigate remainders.

problem

Algebra From Geometry

11 to 16

Account of an investigation which starts from the area of an annulus and leads to the formula for the difference of two squares.

problem

Number Spirals

7 to 11

This task opens up an investigation of a different kind of spiral. This may open doors to new ideas.

problem

Measure Our Weights

5 to 7

This practical challenge focuses on what you would use to find out your weight.

problem

Favourite

Binomial

16 to 18

By considering powers of (1+x), show that the sum of the squares of the binomial coefficients from 0 to n is 2nCn

problem

Favourite

Arithmagons

11 to 16

Can you find the values at the vertices when you know the values on the edges?

page

Endorsement

Find out where NRICH has been recommended.