Cognitive Reflection Test (CRT) Practice

To determine the number that, when multiplied by 2, results in 16, you can set up a simple equation: let the unknown number be represented as \( x \). According to the question, the equation would be:

\[ 2x = 16 \]

To find \( x \), divide both sides of the equation by 2:

\[ x = \frac{16}{2} \]

This calculation yields:

\[ x = 8 \]

Thus, the number we are looking for is indeed 8. Multiplying 8 by 2 confirms this, as:

\[ 2 \times 8 = 16 \]

This matches the condition set forth in the question, validating that 8 is the correct answer. The other numbers — 4, 6, and 10 — do not fulfill the requirement, since multiplying these numbers by 2 will not yield 16.