For how many integers $n$ where $2 \le n \le 100$ is $\binom{n}{2}$ odd?
Question:
For how many integers $n$ where $2 \le n \le 100$ is $\binom{n}{2}$ odd?
Answer:
Let's think step by step.

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For how many integers $n$ where $2 \le n \le 100$ is $\binom{n}{2}$ odd?
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