Question : If the mean of five numbers 1, 2, 3, 5, and $x$ is 2.4, then find the value of $x$.

Option 1: 2

Option 2: 4

Option 3: 1

Option 4: 3

Question : If (7x + y) : (7x – y) = 7 : 3, then what is the value of x : y?

Option 1: 4 : 3

Option 2: 5 : 14

Option 3: 15 : 6

Option 4: 6 : 15

Question : If $8 : x :: x : 32$, find the positive value of $x$.

Option 1: 20

Option 2: 16

Option 3: 4

Option 4: 12

Question : What is the value of $x$, if $\frac{1}{2}$ of 20 + $\frac{1}{4}$ of 28 – $\frac{1}{4}$ of $x$ = 10?

Option 1: 21

Option 2: 7

Option 3: 28

Option 4: 10

Question : Find the value of $\sqrt{\left[\left(7^2+6^3+9^2\right) \div 2+52\right]}$.

Option 1: 14

Option 2: 15

Option 3: 16

Option 4: 13