Question : If $\frac{P}{2}=\frac{Q}{5}=\frac{R}{6}$, then what is the value of $P^2:(P+Q)^2:(Q+R)^2$?

Option 1: 10 : 56 : 169

Option 2: 4 : 49 : 121

Option 3: 9 : 64 : 144

Option 4: 16 : 10 : 125

Question : If the altitude of a triangle is increased by 10% while its area remains the same, its corresponding base will have to be decreased by:

Option 1: $10\%$

Option 2: $9\%$

Option 3: $9\frac{1}{11}\%$

Option 4: $11\frac{1}{9}\%$

Question : If profit is $\frac{1}{11}$th of the selling price, what is the profit percentage?

Option 1: $9\frac{1}{11}\%$

Option 2: $10\%$

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

Option 4: $11\frac{1}{9}\%$

Question : If $A=\frac{2}{3} \div \frac{4}{9}, B=\frac{6}{11} \times\frac{33}{12}$ and $C=\frac{1}{3} \times \frac{9}{2}$, then what is the value of $A \times B-C$?

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

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

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

Option 4: $\frac{3}{16}$

Question : What is the value of $\frac{28}{21} \times \frac{96}{4} \div \frac{125}{5} \times \frac{42}{192}+\frac{297}{125} \times \frac{875}{3} \div \frac{99}{4} \times \frac{6}{25}?$

Option 1: $11$

Option 2: $\frac{9}{25}$

Option 3: $\frac{7}{25}$

Option 4: $7$