Can you find any two-digit numbers that satisfy all of these statements?
Here is a machine with four coloured lights. Can you develop a strategy to work out the rules controlling each light?
Here is a machine with four coloured lights. Can you make two lights switch on at once? Three lights? All four lights?
Can you work out which spinners were used to generate the frequency charts?
These Stage 3 and 4 problems have not yet been solved. Can you be the first?