In this interactivity each fruit has a hidden value. Can you deduce what each one is worth?
Investigate how you can work out what day of the week your birthday will be on next year, and the year after...
Identical squares of side one unit contain some circles shaded blue. In which of the four examples is the shaded area greatest?
Which set of numbers that add to 100 have the largest product?
My two digit number is special because adding the sum of its digits to the product of its digits gives me my original number. What could my number be?
It's easy to work out the areas of most squares that we meet, but what if they were tilted?
Experiment with the interactivity of "rolling" regular polygons, and explore how the different positions of the dot affects the distance it travels at each stage.
How many pairs of numbers can you find that add up to a multiple of 11? Do you notice anything interesting about your results?
Take any four digit number. Move the first digit to the end and move the rest along. Now add your two numbers. Did you get a multiple of 11?
