Secondary Live Problems

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

This set of tasks will stop being live on Monday 23 March. 

Matching Fractions, Decimals and Percentageslive

Age 7 to 14 Challenge Level:

Can you match pairs of fractions, decimals and percentages, and beat your previous scores?

Fractions and Percentages Card Gamelive

Age 11 to 16 Challenge Level:

Can you find the pairs that represent the same amount of money?

Terminating or Notlive

Age 11 to 14 Challenge Level:

Is there a quick way to work out whether a fraction terminates or recurs when you write it as a decimal?

Standard Index Form Matchinglive

Age 14 to 16 Challenge Level:

Can you match these calculations in Standard Index Form with their answers?

Tiny Nineslive

Age 14 to 16 Challenge Level:

What do you notice about these families of recurring decimals?

Repetitiouslylive

Age 14 to 16 Challenge Level:

Can you express every recurring decimal as a fraction?

Secondary Toughnutslive

Age 11 to 18 Challenge Level:

These secondary problems have not yet been solved. Can you be the first?