How many pairs of numbers can you find that add up to a multiple of 11? Do you notice anything interesting about your results?
Can you find a reliable strategy for choosing coordinates that will locate the treasure in the minimum number of guesses?
On the graph there are 28 marked points. These points all mark the vertices (corners) of eight hidden squares. Can you find the eight hidden squares?
If you are given the mean, median and mode of five positive whole numbers, can you find the numbers?
Place the numbers 1 to 6 in the circles so that each number is the difference between the two numbers just below it.
This is a game for two players. Can you find out how to be the first to get to 12 o'clock?
Here is a Sudoku with a difference! Use information about lowest common multiples to help you solve it.
Use your skill and judgement to match the sets of random data.
Can you tangle yourself up and reach any fraction?
It would be nice to have a strategy for disentangling any tangled ropes...
