How many elements are in the set $\{x : x \in \mathbb{Z}, -\dfrac{1}{2} < x < \dfrac{9}{2}\}$?
A$4$
B$5$
C$6$
Dinfinite
Answer & Solution
Correct answer: B. $5$
Integers strictly between $-1/2$ and $9/2$: $0, 1, 2, 3, 4$. Five elements.
- **A** drops $0$.
- **C** includes $-1$ or $5$ (out of range).
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