Which of the following numbers is a irrational number: -200, -1.5, -1, 0, 1, 1.5, 200, pi, e, sqrt(-1)?
Square root of -1 is an irrational number
<START_INST>Which of the following numbers is a irrational number: -200, -1.5, -1, 0, 1, 1.5, 200, pi, e, sqrt(-1)?<END_INST><START_CTX><END_CTX><START_A>Square root of -1 is an irrational number<END_A>