1. If a * b = 2a - 3b + ab, then 3 * 5 + 5 * 3 is equal to?
2. If $$p \times q = p + q + \frac{p}{q}{\text{,}}$$ then the value of 8 × 2 is?
3. The value of $$\left( {{\text{1 + }}\frac{1}{x}} \right)$$ $$\left( {{\text{1 + }}\frac{1}{{x + 1}}} \right)$$ $$\left( {{\text{1 + }}\frac{1}{{x + 2}}} \right)$$ $$\left( {{\text{1 + }}\frac{1}{{x + 3}}} \right)$$ is?
4. If $$\frac{a}{b}{\text{ = }}\frac{2}{3}$$ and $$\frac{b}{c}{\text{ = }}\frac{4}{5}{\text{,}}$$ then the ration $$\frac{{a + b}}{{b + c}}$$ equal to?
5. If $$\frac{{2a + b}}{{a + 4b}} = 3{\text{,}}$$ then find the value of $$\frac{{a + b}}{{a + 2b}} = ?$$
6. If a * b = a + b + ab, then 3 * 4 - 2 * 3 is equal to?
7. If a : b = 2 : 3 and b : c = 4 : 5, find a2 : b2 : bc = ?
8. If $${\text{A}}:{\text{B}} = \frac{1}{2}:\frac{3}{8}{\text{,}}$$ $${\text{B}}:{\text{C}} = \frac{1}{3}:\frac{5}{9}$$ and $${\text{C}}:{\text{D}} = \frac{5}{6}:\frac{3}{4}{\text{,}}$$ then find the ratio of A : B : C : D = ?
9. If A : B : C = 2 : 3 : 4, then $$\frac{{\text{A}}}{{\text{B}}}{\text{:}}\frac{{\text{B}}}{{\text{C}}}{\text{:}}\frac{{\text{C}}}{{\text{A}}}$$ is equal to?
10. If $$\frac{{144}}{{0.144}} = \frac{{14.4}}{x}{\text{,}}$$ then the value of x is?
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