Skip over navigation

Live Problems - Stage 3, 4 & 5

Each time students visit the NRICH site there will be some activities which are 'live'. That means we are inviting students to send us their solutions and we will publish a selection of them, along with their name and school's name. If you'd like to know more about what we're looking for, read this short article.

The last day for sending in solutions to these live problems is Monday 27 November.

Xavi's T-shirtLive

Age 7 to 16

Challenge Level Yellow star

How much can you read into a T-shirt?

Markov MatricesLive

Age 14 to 18

Challenge Level Yellow star

Use matrices to find out how much cake I eat.

The MatrixLive

Age 14 to 18

Challenge Level Yellow star

Explore a new way of multiplying with matrices.

Flipping Twisty MatricesLive

Age 14 to 18

Challenge Level Yellow star

Investigate the transformations of the plane given by the 2 by 2 matrices with entries taking all combinations of values 0, -1 and +1.

A Powerful MatrixLive

Age 14 to 18

Challenge Level Yellow star

What happens when you find the powers of this matrix?

Square PairLive

Age 14 to 18

Challenge Level Yellow star

Explore the shape of a square after it is transformed by the action of a matrix.

Two and Four Dimensional NumbersLive

Age 16 to 18

Challenge Level Yellow star

Matrices and Complex Numbers combine to enable us to create four dimensional numbers.

Fix Me or Crush MeLive

Age 16 to 18

Challenge Level Yellow star

Can you make matrices which will fix one lucky vector and crush another to zero?

Matrix MeaningLive

Age 16 to 18

Challenge Level Yellow star

Explore the meaning behind the algebra and geometry of matrices with these 10 individual problems.

Pass the ParcelLive

Age 16 to 18

Challenge Level Yellow star

Use matrices to model this popular party game.

Transformations for 10Live

Age 16 to 18

Challenge Level Yellow star

Explore the properties of matrix transformations with these 10 questions.