18800 / 470 / 20

Answer: Option A

Explanation:

After applying BOMAS rule,
First Multiplication will be done then addition
So it will be 100 + 100 = 200

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 D

Explanation:

b-[b-(a+b)-{b-(b-a+b)}+2a]
=b-[b-a-b-{b-(2b-a)}+2a]
=b-[-a-{b-2b+a}+2a]
=b-[-a-{-b+a}+2a]
=b-[-a+b-a+2a]
=b-[-2a+b+2a]
=b-b
=0

Answer: Option C

Explanation:

As per BODMAS rule, first we will solve the equation in bracket then we will go for division
= (9240)/28 = 330

Answer: Option C

Explanation:

We need so simple divide 42.5/0.85,
=(4250/85) = 50