To determine which of the given differences results in a rational number, let's evaluate each expression:
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\( 5 - \sqrt{2} \): This expression involves the subtraction of the irrational number \(\sqrt{2}\) from the rational number 5. The result is irrational.
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\( \sqrt{36} - \frac{2}{3} \): Here, \(\sqrt{36} = 6\) is a rational number, and \(\frac{2}{3}\) is also rational. The difference \(6 - \frac{2}{3} = \frac{18}{3} - \frac{2}{3} = \frac{16}{3}\) is rational.
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\( \pi - 1 \): Since \(\pi\) is an irrational number and 1 is rational, their difference is also irrational.
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\( 6.2 - \sqrt{3} \): Here, 6.2 is rational, and \(\sqrt{3}\) is irrational, so \(6.2 - \sqrt{3}\) is irrational.
Out of these options, only the difference \( \sqrt{36} - \frac{2}{3} \) results in a rational number. Thus, the answer is:
\( \sqrt{36} - \frac{2}{3} \)