Question : Simplify: $2.5 \times[144 \div 198 \times\{121 \times 81 \div(11 \times 9)\}]$

Option 1: 180

Option 2: 175

Option 3: 185

Option 4: 190

Question : Simplify the following expression.
$(2 \times 7-5+9 \div 3) \div(4+2)^2 \times 2$

Option 1: $2$

Option 2: $\frac{3}{2}$

Option 3: $\frac{2}{3}$

Option 4: $1.5$

Question : Simplify the given expression.
$18 \div 3$ of $2 \times 5+72 \div 18$ of $2 \times 3-4 \div 8 \times 2$

Option 1: $20$

Option 2: $\frac{20}{3}$

Option 3: $\frac{25}{3}$

Option 4: $25$

Question : The value of $4 \div 12$ of $[3 \div 4$ of $\{(4-2) \times 6 \div 2\}]-2 \times 6 \div 8+3$ is:

Option 1: $4 \frac{1}{6}$

Option 2: $3 \frac{1}{3}$

Option 3: $2 \frac{1}{3}$

Option 4: $7 \frac{1}{6}$

Question : Simplify $\sqrt{36 x^2-108 x+81}$.

Option 1: $6x-9$

Option 2: $2x-9$

Option 3: $5x-9$

Option 4: $3x-3$

Question : The value of $\left(2 \frac{6}{7}\right.$ of $\left.4 \frac{1}{5} \div \frac{2}{3}\right) \times 5 \frac{1}{9} \div\left(\frac{3}{4} \times 2 \frac{2}{3}\right.$ of $\left.\frac{1}{2} \div \frac{1}{4}\right)$ is:

Option 1: 25

Option 2: 19

Option 3: 23

Option 4: 21