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The expression is 13
\Observe that the number 13, so the number 13 is a rational number, Whole number, integers, and rational numbers.
\§ Observe the Venn diagram:
\§ The number 13 is not a Natural number (N), not a Whole number (W), and not an Integer (Z).
\§ The number 13 is a rational number (Q).
\§ All rational numbers (Q) are real numbers (R).
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The number 13 belongs to Q and R.
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