Question : Find the value.
$80.40 \div 20-(-4.02)+2.06=$_______.

Option 1: 9.8

Option 2: 10.2

Option 3: 10.1

Option 4: 8.2

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 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 : Find the value of the given expression.
$1755 \div 39 \times(8-28 \div 4)-2$

Option 1: – 315

Option 2: – 45

Option 3: 270

Option 4: 43

Question : Find the value of the given expression.
$\sqrt{20-\sqrt{20-\sqrt{20-\sqrt{20-\cdots \infty}}}}$

Option 1: 4

Option 2: 6

Option 3: 5

Option 4: 2

Question : The value of
$51 \div\left\{25+(25\right.$ of $12 \div 30)-\left(5^4 \div 5\right.$ of 125$\left.)\right\}$ is:

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

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

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

Option 4: $-\frac{3}{2}$