Simplfy
b - [b -(a+b) - {b - (b - a+b)} + 2a]

Answer: Option C

Explanation:

$$\begin{aligned} = \frac{1}{2+\frac{1}{2+\frac{1}{\frac{3}{2}}}} \end{aligned}$$
$$\begin{aligned} = \frac{1}{2+\frac{1}{2+\frac{2}{3}}} \end{aligned}$$

$$\begin{aligned} = \frac{1}{2+\frac{1}{\frac{8}{3}}} \end{aligned}$$

$$\begin{aligned} = \frac{1}{2+\frac{3}{8}} \end{aligned}$$

$$\begin{aligned} = \frac{1}{\frac{19}{8}} \end{aligned}$$

$$\begin{aligned} = \frac{8}{19} \end{aligned}$$

Answer: Option B

Explanation:

$$\begin{aligned} \frac{4+72-6-8}{738-730} \end{aligned}$$
$$\begin{aligned} = \frac{76-14}{8} \end{aligned}$$
$$\begin{aligned} = \frac{62}{8} = 7.75 \end{aligned}$$

Answer: Option A

Explanation:

By taking LCM we get
=

$$\begin{aligned} \frac{28+14+7+4+2+1}{28} = \frac{56}{28} = 2\end{aligned}$$

Answer: Option D

Answer: Option C

Explanation:

Let the number of buffaloes be x and the number of ducks be y
=> 4x + 2y = 2 (x + y) + 24

=> 2x = 24 => x = 12