How many pairs of numbers can you find that add up to a multiple of 11? Do you notice anything interesting about your results?
If you have a large supply of 3kg and 8kg weights, how many of each would you need for the average (mean) of the weights to be 6kg?
You have two sets of the digits 0-9. Can you arrange these in the five boxes to make four-digit numbers as close to the target numbers as possible?
What is the same and what is different about these circle questions? What connections can you make?
Investigate the normal distribution
How will you complete these interactive Venn diagrams?
Can you find a reliable strategy for choosing coordinates that will locate the treasure in the minimum number of guesses?
Can you put the numbers 1-5 in the V shape so that both 'arms' have the same total?
Crosses can be drawn on number grids of various sizes. What do you notice when you add opposite ends?
