Question : By selling 50 items, a shopkeeper gains the selling price of 10 items. What is his gain percentage?

Option 1: 10%

Option 2: 15%

Option 3: 25%

Option 4: 40%

Question : By selling 35 articles, a shopkeeper gains the selling price of 15 articles. Find his gain percentage.

Option 1: 88%

Option 2: 40%

Option 3: 75%

Option 4: 60%

Question : By selling 100 notebooks, a shopkeeper gains the selling price of 20 notebooks. What is his gain percentage?

Option 1: 62.4%

Option 2: 22.5%

Option 3: 50.4%

Option 4: 25%

Question : LCM of $\frac{5}{33},\frac{25}{11},\frac{20}{55},$ and $\frac{15}{77}$ is:

Option 1: $\frac{300}{11}$

Option 2: $\frac{300}{77}$

Option 3: $\frac{25}{33}$

Option 4: $\frac{500}{11}$

Question : If 2 times of selling price is equal to 3 times of cost price, then what is the profit percentage?

Option 1: 4 percent

Option 2: 40 percent

Option 3: 25 percent

Option 4: 50 percent