Teachers, while discussing problem-solving as an approach to the teaching of Mathematics, articulated four views. Which of the following views does not justify the real meaning of this approach?

A farmer purchased a piece of land for Rs. 18 lakh and spent Rs. 3 lakh for registration, fencing etc. He sold it for Rs. 24.57 lakh. Find his profit in percentage.

1. 15%
2. 14.15%
3. 16.5%
4. 17%

The price of a refrigerator and a television set are in the ratio $5:3$. If the refrigerator costs $₹5500$ more than the television set, then the price of the refrigerator is?

Vinod purchased a Maruti van for $₹196000$. Rate of fall of price per year of this van is $14\frac{2}{7}\%$. What will be its price after two years?

Karan purchased one dozen pens for $120$ and sold a pack of $3$ pens for Rs. $35$ each. What is his gain? 

1.$16.67\%$
2. $20\%$
3.$15\%$
4.$33.33\%$

Rahul sells two helmets at the rate of $Rs. 1232$ each. He gains $12\%$ on one and loses $12\%$ on the other. What will be the total loss (in $Rs.$) in the whole transaction?

Successive discounts of $20\%$ and $10\%$ are given on an item marked at $Rs.700$. Find the selling price.

Two drum sets were purchased for $₹8000$. The first is sold at a profit of $40\%$ and the second is sold at a loss of $40\%$. If the selling price of both the drum sets is the same then what is their cost price? 

A person purchased a table for $₹11000$ and sold it for $₹13500$. What is his gain percentage?

$1.$ $19.8\%$
$2.$ $20.6\%$
$3. 22.7\%$
$4.$ $22\%$