Daily Lego Maths: Day 1

Here are the first three stages of a pattern made out of Lego.
What do you notice?
What do you wonder?
What questions might a mathematician ask?

An overhead view of three patterns made from square red and yellow lego bricks: the first is a single yellow square, the second has yellow-red on the top row and red-yellow on the bottom, and the third has three rows: yellow-red-yellow on top, red-yellow-red in the middle, yellow-red-yellow on the bottom.

Can you work out how many yellow bricks and how many red bricks you’d need to make the tenth pattern in the sequence?
Or the 100th pattern?
Or the nth pattern?

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