131. Simplify the following $${81^{\frac{3}{4}}} + \left[ {\left( {20 \div 5\,{\text{of }}3 \times 6} \right) + \left\{ {\left( {8 \div 24\,{\text{of }}3} \right) \times 4} \right\} - 10 \div 5} \right] - {\left( {\frac{1}{{32}}} \right)^{ - \frac{2}{5}}}$$
132. If $$\frac{1}{{4.263}} = 0.2346,$$ find the value of $$\frac{1}{{0.0004263}}.$$
133. The value of: 7.5 + (5.4 ÷ 4.5 × 2) - 8 × 4 ÷ 3.2
134. What is the value of $$x$$, if $$5\left( {1 - \frac{x}{5}} \right) - \left( {5 - x} \right) - \frac{1}{{200}}\,{\text{of }}\left( {20 - x} \right) = 0.08?$$
135. The value of $$\left( {2.\overline 4 \times 2.\overline 6 \times 3 \times 0.1\overline 6 } \right) \times \left[ {0.\overline {27} \times \left( {0.8\overline 3 \div 0.1\overline 6 } \right)} \right]{\text{is:}}$$
136. The value of 18% of 15% of $$\frac{{25}}{9}$$ of 3800 is:
137. The value of 1 + 3 + 5 + 7 + . . . . . . (2n - 1) is:
138. The value of $$\left( {5\frac{1}{4} \div \frac{3}{7}\,{\text{of }}\frac{1}{2}} \right) \div \left( {5\frac{1}{9} - 7\frac{7}{8} \div 9\frac{9}{{20}}} \right) \times \frac{{11}}{{21}} - \left( {5 \div 2\,{\text{of }}\frac{1}{2}} \right){\text{is:}}$$
139. Simplify the following $$\frac{{0.75}}{{10}} + \frac{{0.31}}{{100}} + \frac{{0.09}}{{1000}}$$
140. The value of $$\frac{3}{{70}} + \frac{1}{{42}} + \frac{1}{{66}} + \frac{3}{{286}} + \frac{1}{{130}} + \frac{1}{{170}}$$ is:
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