We use ideas about probability to predict what might happen. The coin flip, for instance, is a basic example of probability that most people are familiar with. Heads or tails. Fifty-fifty. Even-Steven. If you flip a fair coin many-many times, half the flips will come up heads and the other half will be tails. It’s not hard to think this through. You see the coin. You see … [Read more...] about Put 100 Marbles in a Bucket

# Science project

## What is the Same?

The questions How many triangles are in this picture? How many of them are the same? With some careful observation and counting, you can answer the first question. You can’t answer the second one, though. Not until you decide what you mean by “same.” Counting the triangles Show the picture of the triangles to a friend and count them together. That’s a good way to make … [Read more...] about What is the Same?