<|im_start|>user
Which of the following numbers is a real number: -200, -1.5, -1, 0, 1, 1.5, 200, pi, e, sqrt(-1)?<|im_end|>
<|im_start|>assistant
The real numbers among those are -200, -1.5, -1, 0, 1, 1.5, 200, pi, e<|im_end|>
