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Interval Challenge

A clinical drill for **Quantitative Fluid Intelligence**. Your objective is to identify the missing number in a logical sequence by calculating the underlying arithmetic interval.

Logic Protocol:

Observe the sequence of numbers. Determine the pattern (the interval) and select the value that logically completes the set. This exercise tests your **Pattern Recognition** and **Working Memory**.

The Science of Quantitative Reasoning

Numerical sequences require the brain to engage in **Inductive Reasoning**. This is the ability to take specific observations (the numbers shown) and deduce a general rule (the interval).

This process primarily occurs in the **Intraparietal Sulcus**, a region of the brain specialized for processing numerical magnitude and spatial-numerical associations.

"Training with numerical intervals improves 'Number Sense,' which is foundational for complex problem-solving and executive function."

Cognitive Load Management

As the sequences become more complex, your **Working Memory** must hold multiple variables: the current number, the previous number, and the hypothesized interval.

Strengthening this mental "scratchpad" allows for faster data processing in real-world scenarios, from financial planning to split-second logical deductions.

🧩 Recommended Brain Training Books & Memory Games

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