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problem
2 out of 3
Total Totality
11 to 14
2 out of 3
Is it possible to arrange the numbers 1-6 on the nodes of this diagram, so that all the sums between numbers on adjacent nodes are different?
problem
1 out of 3
Favourite
An Easy Way to Multiply by 10?
7 to 11
1 out of 3
Do you agree with Badger's statements? Is Badger's reasoning 'watertight'? Why or why not?
problem
2 out of 3
Favourite
Two Primes Make One Square
7 to 11
2 out of 3
Can you make square numbers by adding two prime numbers together?
problem
2 out of 3
Counting Counters
7 to 11
2 out of 3
Take a counter and surround it by a ring of other counters that MUST touch two others. How many are needed?
problem
1 out of 3
Unit Differences
5 to 7
1 out of 3
This challenge is about finding the difference between numbers which have the same tens digit.
problem
2 out of 3
Change Around
5 to 7
2 out of 3
Move just three of the circles so that the triangle faces in the opposite direction.
problem
2 out of 3
Favourite
Changing Areas, Changing Volumes
11 to 14
2 out of 3
How can you change the surface area of a cuboid but keep its volume the same? How can you change the volume but keep the surface area the same?
problem
3 out of 3
Rod Ratios
7 to 11
3 out of 3
Use the Cuisenaire rods environment to investigate ratio. Can you find pairs of rods in the ratio 3:2?