problem
Digit addition
Age
5 to 11
Challenge level
Try out this number trick. What happens with different starting numbers? What do you notice?
problem
I'm eight
Age
5 to 11
Challenge level
Find a great variety of ways of asking questions which make 8.
problem
Strike it out
Age
5 to 11
Challenge level
Use your addition and subtraction skills, combined with some strategic thinking, to beat your partner at this game.
problem
Dotty six
Age
5 to 11
Challenge level
Dotty Six is a simple dice game that you can adapt in many ways.
problem
Seeing squares
Age
5 to 11
Challenge level
Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a square.
problem
Next-door numbers
Age
5 to 7
Challenge level
Florence, Ethan and Alma have each added together two 'next-door' numbers. What is the same about their answers?
problem
Eightness of eight
Age
5 to 7
Challenge level
What do you see as you watch this video? Can you create a similar video for the number 12?
problem
Unexpected ordering
Age
5 to 7
Challenge level
Watch the video of Fran re-ordering these number cards. What do you notice? Try it for yourself. What happens?
problem
Ring a ring of numbers
Age
5 to 7
Challenge level
Choose four of the numbers from 1 to 9 to put in the squares so that the differences between joined squares are odd.
problem
School fair necklaces
Age
5 to 11
Challenge level
How many possible symmetrical necklaces can you find? How do you know you've found them all?
problem
Surprising split
Age
7 to 11
Challenge level
Does this 'trick' for calculating multiples of 11 always work? Why or why not?
problem
Consecutive numbers
Age
7 to 14
Challenge level
An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.
problem
Number differences
Age
7 to 11
Challenge level
Place the numbers from 1 to 9 in the squares below so that the difference between joined squares is odd. How many different ways can you do this?
problem
Magic Vs
Age
7 to 11
Challenge level
Can you put the numbers 1-5 in the V shape so that both 'arms' have the same total?
problem
Subtraction surprise
Age
7 to 14
Challenge level
Try out some calculations. Are you surprised by the results?