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Ensure that the final number in your chain matches the logic of the entire scheme. If there are branching arrows, check that each path leads to a mathematically sound conclusion.

According to the Skysmart solution guide , the sequence is solved as follows:

The problem features a series of circles (nodes) and arrows. Your first step is to identify the "entry point"—the circle that has no arrows pointing into it. This is usually the first circle on the left, representing the smallest or starting value in this specific exercise.

The Peterson method (by L.G. Peterson) is designed to develop and problem-solving skills rather than rote memorization. By using these visual schemes, students learn:

: Understanding how one change affects the next step in a sequence.

The task usually requires students to fill in missing numbers within a "chain" or "scheme" of circles connected by arrows. Each arrow represents a mathematical operation (like +1positive 1 -1negative 1