Happy Birthday NRICH!

Happy Birthday NRICH!

To celebrate NRICH's 20th birthday, we are bringing together some rich mathematical activities that we think are 'hidden gems'.  You may not have come across these tasks before, perhaps because some of them are quite new, whereas others are rather old, but all of them are worth exploring.  Get your mathematical thinking hat on!

Up and Down Staircases 

Age 7 to 11
Challenge Level
One block is needed to make an up-and-down staircase, with one step up and one step down. How many blocks would be needed to build an up-and-down staircase with 5 steps up and 5 steps down?

Always, Sometimes or Never? Shape 

Age 7 to 11
Challenge Level
Are these statements always true, sometimes true or never true?

Ice Cream 

Age 7 to 11
Challenge Level
You cannot choose a selection of ice cream flavours that includes totally what someone has already chosen. Have a go and find all the different ways in which seven children can have ice cream.

Method in Multiplying Madness? 

Age 7 to 14
Challenge Level
Watch our videos of multiplication methods that you may not have met before. Can you make sense of them?