Question : The average of prime numbers between 1 and 20 is:

Option 1: $9$

Option 2: $9\frac{5}{8}$

Option 3: $10\frac{1}{8}$

Option 4: $8$

Question : Determine the correct answer for $(\frac{1}{8}+\frac{9}{4}-3)$:

Option 1: $\frac{2}{8}$

Option 2: $\frac{7}{8}$

Option 3: $-\frac{5}{8}$

Option 4: $-\frac{3}{8}$

Question : Of the three numbers, the first is twice the second, and the second is twice the third. The average of the reciprocal of the numbers is $\frac{7}{12}$. The numbers are:

Option 1: 20, 10 and 5

Option 2: 4, 2 and 1

Option 3: 36, 18 and 9

Option 4: 16, 8 and 4

Question : The value of $\frac{3}{8}+\left[\left(\frac{4}{8} \div \frac{2}{3}\right) \times \frac{8}{5}+\frac{3}{10}\right]$ is:

Option 1: $\frac{15}{8}$

Option 2: $\frac{3}{8}$

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

Option 4: $\frac{15}{2}$

Question : The value of $\frac{2}{3} \times \frac{6}{5} \times \frac{10}{4}+\frac{1}{8}-\frac{3}{8}$ is:

Option 1: $\frac{4}{3}$

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

Option 3: $\frac{4}{7}$

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