1. Sum of two rational numbers is ______ number.

2. If x² = -4 then the value of x is

3. Solve: (x + 1)² + (x² + 3x + 2)² = 0

4. If (x + 3)/(x – 2) > 1/2 then x lies in the interval

5. The region of the XOY-plane represented by the inequalities x ≥ 6, y ≥ 2, 2x + y ≤ 10 is

6. The interval in which f(x) = (x – 1) × (x – 2) × (x – 3) is negative is

7. If -2 < 2x – 1 < 2 then the value of x lies in the interval

8. The solution of the inequality |x – 1| < 2 is

9. If | x − 1| > 5, then

10. The solution of |2/(x – 4)| > 1 where x ≠ 4 is