Multiply:
i 16 by 9
ii 18 by-6
iii 36 by-11
iv -28 by 14
v -53 by 18
vi -35 by 0
vii 0 by -23
viii -16 by-12
ix -105 by-8
x -36 by-50
xi -28by-1
xii 25 by -11

Answer

Let's solve the multiplication problems step by step.

### Step-by-Step Solutions:

1. **Multiply 16 by 9:**
\[ 16 \times 9 = 144 \]

2. **Multiply 18 by -6:**
\[ 18 \times (-6) = -108 \]

3. **Multiply 36 by -11:**
\[ 36 \times (-11) = -396 \]

4. **Multiply -28 by 14:**
\[ (-28) \times 14 = -392 \]

5. **Multiply -53 by 18:**
\[ (-53) \times 18 = -954 \]

6. **Multiply -35 by 0:**
\[ (-35) \times 0 = 0 \]

7. **Multiply 0 by -23:**
\[ 0 \times (-23) = 0 \]

8. **Multiply -16 by -12:**
\[ (-16) \times (-12) = 192 \]

9. **Multiply -105 by -8:**
\[ (-105) \times (-8) = 840 \]

10. **Multiply -36 by -50:**
\[ (-36) \times (-50) = 1800 \]

11. **Multiply -28 by -1:**
\[ (-28) \times (-1) = 28 \]

12. **Multiply 25 by -11:**
\[ 25 \times (-11) = -275 \]