111. Suppose 4a = 5, 5b = 6, 6c = 7, 7d = 8, then the value of abcd is = ?
112. If $${\text{5}}\sqrt 5 \times {{\text{5}}^3} \div {{\text{5}}^{ - \frac{3}{2}}}{\text{ = }}{{\text{5}}^{a + 2}}{\text{,}}$$ then the value of a is = ?
113. The value of $$\frac{1}{{\sqrt 7 - \sqrt 6 }} - $$ $$\frac{1}{{\sqrt 6 - \sqrt 5 }} + $$ $$\frac{1}{{\sqrt 5 - 2 }} - $$ $$\frac{1}{{\sqrt 8 - \sqrt 7 }} + $$ $$\frac{1}{{3 - \sqrt 8 }} = ?$$
114. If abc = 1, then $${\frac{1}{{1 + a + {b^{ - 1}}}} + }$$ $${\frac{1}{{1 + b + {c^{ - 1}}}} + }$$ $${\frac{1}{{1 + c + {a^{ - 1}}}}}$$ = ?
115. If 3(x-y) = 27 and 3(x+y) = 243, then x is equal to = ?
116. If 32x-y = 3x+y = $$\sqrt {27} {\text{,}}$$ the value of y is = ?
117. $$\frac{{\sqrt {10 + \sqrt {25 + \sqrt {108 + \sqrt {154 + \sqrt {225} } } } } }}{{\root 3 \of 8 }} $$ = ?
118. $$\frac{{{6^2} + {7^2} + {8^2} + {9^2} + {{10}^2}}}{{\sqrt {7 + 4\sqrt 3 } - \sqrt {4 + 2\sqrt 3 } }}$$ is equal to = ?
119. Given 2x = 8y+1 and 9y = 3x-9 , then value of x + y is = ?
120. What are the values of x and y that satisfy the equation, $${{\text{2}}^{0.7x}}{\text{.}}{{\text{3}}^{ - 1.25y}}{\text{ = }}\frac{{8\sqrt 6 }}{{27}}{\text{ ?}}$$
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