There are lots of rectangles in this figure, but how many of them have the area we're looking for?
4,943 people working on this
As long as townsfolk need to cross the river, Galileo's ferry will be at their service. But can Galileo cross safely when the current is fast?
Series 4 of 4
9,529 people working on this
With differently sized containers we can measure different volumes. Do the possible volumes change when a container starts partially full?
6,287 people working on this
Knowing how your opponent will play in a game allows you to make the best possible move. How is this game won?
8,026 people working on this
Looking at everything in this figure could get overwhelming. Instead, think about how it's built in steps.
9,196 people working on this
To find the median of a data set, order the values… but can you locate the median without the exact values?
8,776 people working on this
In real-life collisions, objects lose energy. How does this fact limit the height of the top ball?
Series 5 of 5
9,830 people working on this