61. If $$\frac{1}{{x + \frac{1}{{y + \frac{2}{{z + \frac{1}{4}}}}}}} = \frac{{29}}{{79}},$$ where x, y and z are natural numbers, then the value of (2x + 3y - z) is:
62. If $$\frac{1}{5}$$ of $$\frac{1}{4}$$ of a number is 35, then how much is $$\frac{7}{8}$$ of that number?
63. A students was asked to find the value of $$9\frac{4}{9} \div 11\frac{1}{3}{\text{ of }}\frac{1}{6} + \left( {1\frac{1}{3} \times 1\frac{4}{5} \div \frac{3}{5}} \right) \times 2\frac{1}{6}{\text{ of }}\frac{2}{3} \div \frac{4}{3}{\text{ of }}\frac{2}{3}.$$ His answer was $$19\frac{1}{4}.$$ What is the difference between his answer and the correct answer?
64. What is the simplified value of the following?
$$\frac{{9 \div \frac{3}{7}{\text{ of }}\left( {9 + 6 \times \overline {4 - 2} } \right) + \left[ {\frac{1}{5} \div \frac{7}{{25}} - \left\{ {\frac{5}{8} + \frac{6}{{16}}} \right\}} \right]}}{{24 \div \overline {16 - 10} + 36 \div \left( {5 + 20 \div 4 - 1} \right)}}$$
$$\frac{{9 \div \frac{3}{7}{\text{ of }}\left( {9 + 6 \times \overline {4 - 2} } \right) + \left[ {\frac{1}{5} \div \frac{7}{{25}} - \left\{ {\frac{5}{8} + \frac{6}{{16}}} \right\}} \right]}}{{24 \div \overline {16 - 10} + 36 \div \left( {5 + 20 \div 4 - 1} \right)}}$$
65. The value of $$2.\overline {13} \div 3.\overline {12} $$ is:
66. The value of $$\left[ {\frac{4}{7}{\text{ of }}2\frac{4}{5} \times 1\frac{2}{3} - \left( {3\frac{1}{2} - 2\frac{1}{6}} \right)} \right] \div \left( {3\frac{1}{5} \div 4\frac{1}{2}{\text{ of }}5\frac{1}{3}} \right){\text{is:}}$$
67. The value of $$3\frac{1}{5} \div 4\frac{1}{2}{\text{ of }}5\frac{1}{3} + \frac{1}{8} \div \frac{1}{2}{\text{ of }}\frac{1}{4} - \frac{1}{4}\left( {\frac{1}{2} \div \frac{1}{8} \times \frac{1}{4}} \right){\text{is:}}$$
68. Find the value of the following expression.
$$\frac{{1\frac{2}{3} \div \frac{5}{6} \times 6 + \frac{4}{5} \times \frac{1}{2} + \frac{2}{3}}}{{2 - \left[ {1\frac{1}{3} \times \left( { - \frac{3}{5}} \right) - 6\left\{ {\frac{3}{5} - \left( {3 - \frac{3}{{10}}} \right)} \right\}} \right]}}$$
$$\frac{{1\frac{2}{3} \div \frac{5}{6} \times 6 + \frac{4}{5} \times \frac{1}{2} + \frac{2}{3}}}{{2 - \left[ {1\frac{1}{3} \times \left( { - \frac{3}{5}} \right) - 6\left\{ {\frac{3}{5} - \left( {3 - \frac{3}{{10}}} \right)} \right\}} \right]}}$$
69. The value of $$\left[ {5\frac{4}{9} \div {{\left( {\frac{{11}}{4} - \frac{{13}}{6}} \right)}^2}} \right] \div {\left[ {7\frac{3}{{11}}{\text{ of }}8\frac{4}{5} \div 1\frac{5}{7} - \frac{4}{3}} \right]^2}{\text{is:}}$$
70. The value of $$\frac{{40 + \frac{3}{4}{\text{ of }}32}}{{37 + \frac{3}{4}{\text{ of }}\left( {34 - 6} \right)}}$$ is:
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