Question : The value of the following expression $\frac{0.2×0.02×0.002×32}{0.4×0.04×0.004×16}$ is:

Option 1: 0.20

Option 2: 0.50

Option 3: 0.4

Option 4: 0.25

Question : If $\sqrt{0.04\times 0.4\times a}=0.004\times 0.4\times \sqrt{b},$ then the value of $\frac{a}{b}$ is:

Option 1: $16\times 10^{-3}$

Option 2: $16\times 10^{-4}$

Option 3: $16\times 10^{-5}$

Option 4: $16 \times 10^{-6}$

Question : The simplified value of (0.2)³ × 400 ÷ 2000 of (0.2)² is:

Option 1: $\frac{1}{25}$

Option 2: $\frac{3}{25}$

Option 3: $\frac{2}{25}$

Option 4: $\frac{1}{50}$

Question : What is the value of $\small \frac{(0.7)^{3}-(0.4)^{3}}{(0.7)^{2}+0.7\times 0.4+(0.4)^{2}}$?

Option 1: 0.3

Option 2: 0.7

Option 3: 0.9

Option 4: 1.1

Question : What is the simplified value of
$\left(1-\frac{1}{4-\frac{2}{1+\frac{1}{\frac{1}{3}+2}}}\right) \times \frac{15}{16} \div \frac{2}{3}$ of $2 \frac{1}{4}-\frac{3+4}{3^3+4^3}$

Option 1: $\frac{5}{13}$

Option 2: $\frac{4}{13}$

Option 3: $\frac{8}{13}$

Option 4: $\frac{6}{13}$