Question : Find the mean proportion between $(6+\sqrt{8})$ and $(3-\sqrt{2})$.

Option 1: $2 \sqrt{12}$

Option 2: $\sqrt{14}$

Option 3: $(6-\sqrt{8})$

Option 4: $\sqrt{15}-7$

Question : If the sum of the measures of all the interior angles of a polygon is 1440$^\circ$, find the number of sides of the polygon.

Option 1: 8

Option 2: 12

Option 3: 10

Option 4: 14

Question : $6\frac{1}{4}$% of 1600 + $12\frac{1}{2}$% of 800 equals:

Option 1: 100

Option 2: 200

Option 3: 300

Option 4: 400

Question : If $4 x^2+y^2=40$ and $x y=6$, find the positive value of $2 x+y$.

Option 1: 8

Option 2: 6

Option 3: 5

Option 4: 4

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