What fraction of $$\begin{aligned} \frac{4}{7}\end{aligned}$$ should be added to itself to become $$\begin{aligned} 1\frac{1}{14} \end{aligned}$$

Answer: Option C

Explanation:

$$\begin{aligned} \frac{\frac{7}{2}\div {\frac{5}{2}} \times {\frac{3}{2}} }{\frac{7}{2} \div { \frac{5}{2}} of \frac{3}{2} }\div 5.25 \end{aligned}$$

$$\begin{aligned} = \frac{\frac{7}{2}\times {\frac{2}{5}} \times {\frac{3}{2}} }{\frac{7}{2} \div { \frac{15}{4}}}\div 5.25 \end{aligned}$$

$$\begin{aligned} = \frac{\frac{21}{10}} {\frac{7}{2} \times { \frac{4}{15}}}\div {\frac{525}{100}} \end{aligned}$$

$$\begin{aligned} = \frac{21}{10}\times{\frac{15}{14}}\times\frac{100}{525} = \frac{6}{14} = \frac{3}{7} \end{aligned}$$

Answer: Option C

Explanation:

N * 50 = (325000 - 300000) = 25000
N = 25000 / 50
= 500

Answer: Option A

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 B

Explanation:

$$\begin{aligned} = 16-[5-(6+2(7-8+5))] \end{aligned}$$
(Please check due to overline, sign has been changed)
$$\begin{aligned} = 16-[5-(6+2 \times 4))] \end{aligned}$$
$$\begin{aligned} = 16-[-9] = 16 + 9 = 25 \end{aligned}$$