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Recursive Sequences

Recursive sequences are patterns where each new number is built from the ones before it.

Think of it this way

A stack of pancakes shows this idea well. Each new pancake you add sits on top of all the ones before it. You cannot place the fifth pancake without the four below it already there. Each step builds directly on the last.

Explaining recursive sequences by grade level

Think about drawing shapes around a circle to guess its size. You start with a simple shape. Then you add more sides each time. Each new shape uses the old one to get closer to the right answer.