How many solutions can you find to this sum? Each of the different letters stands for a different number.
In the 2020 Olympic Games, sport climbing was introduced for the first time, and something very interesting happened with the scoring system. Can you find out what was interesting about it?
Play the divisibility game to create numbers in which the first two digits make a number divisible by 2, the first three digits make a number divisible by 3...
How many moves does it take to swap over some red and blue frogs? Do you have a method?
In how many ways can you fit all three pieces together to make shapes with line symmetry?
Draw some isosceles triangles with an area of $9cm^2$ and a vertex at (20,20). If all the vertices must have whole number coordinates, how many is it possible to draw?
Are these games fair? How can you tell?
Find the frequency distribution for ordinary English, and use it to help you crack the code.
If you are given the mean, median and mode of five positive whole numbers, can you find the numbers?
How many pairs of numbers can you find that add up to a multiple of 11? Do you notice anything interesting about your results?
