Make your own Number Patterns
You can make your own number patterns using coins or matchsticks. Here is an example using coins:
|1 Coin||6 Coins||15 Coins||28 Coins|
How many coins do you need for Size=5 ?
Can you make a formula that will tell you how many coins are needed for any Size? For example Size=20? The formula may look something like
(Note: There are lots of number patterns in Pascal's Triangle)