Let's evaluate each statement:
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\( \frac{2}{3} \) is a rational number.
- True. A rational number is any number that can be expressed as the quotient or fraction of two integers (where the denominator is not zero). \( \frac{2}{3} \) fits this definition.
-
-9 is a whole number.
- False. Whole numbers are non-negative integers (0, 1, 2, 3, ...), and -9 is negative.
-
The square root of 64 is a rational number.
- True. The square root of 64 is 8, which is a whole number and therefore a rational number.
-
π (pi) is an irrational number.
- True. π is well-known to be an irrational number, meaning it cannot be expressed as a fraction of two integers.
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0 is a natural number.
- False. Natural numbers are typically defined as positive integers (1, 2, 3, ...). Some definitions may include 0 as a natural number, but traditionally, it is not considered one.
In summary:
- True
- False
- True
- True
- False