11. If 1 < x < 2, then the value of $$\sqrt {{{\left( {x - 1} \right)}^2}} {\text{ + }}\sqrt {{{\left( {3 - x} \right)}^2}} {\text{ is?}}$$
12. If a ⊕ b = (a × b) + b, then 5 ⊕ 7 equals to?
13. Given that 100.48 = x, 100.70 = y and xz = y2, then the value of z is close to?
14. If 47.2506 = 4A + 7B + 2C + $$\frac{5}{{\text{D}}}$$ + 6E, then the value of 5A + 3B + 6C + D + 3E is?
15. If x * y = x2 + y2 - xy, then the value of 9 * 11 is?
16. If $${3^{x + 3}} + 7 = 250{\text{,}}$$ then x is equal to?
17. If $$\frac{1}{4} \times $$ $$\frac{2}{6} \times $$ $$\frac{3}{8} \times $$ $$\frac{4}{{10}} \times $$ $$\frac{5}{{12}} \times $$ . . . . . $$ \times \frac{{31}}{{64}}$$ $$ = \frac{1}{{{2^x}}}$$ then the value of x is?
18. If $$x = 3 + 2\sqrt 2 {\text{,}}$$ then the value of $$\left( {\sqrt x - \frac{1}{{\sqrt x }}} \right){\text{ is?}}$$
19. If p = 999, then the value of $$\root 3 \of {p\left( {{p^2} + 3p + 3} \right) + 1} {\text{ is?}}$$
20. If $$\frac{a}{b} = \frac{7}{9},{\text{ }}\frac{b}{c} = \frac{3}{5}{\text{,}}$$ then the value of a : b : c is?
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