If C.P. of 20 identical articles is same as S.P. of 25 articles. The profit or the loss as percent is :

1. 25% loss

2. 25% profit

3. 20% loss

4. 20% profit

The marked price of an article is ₹ 500 and is sold for ₹ 400; the discount given is :

1. 10%

2. 20%

3. 25%

4. none of these

By selling 10 articles, a man gains equal to cost price of 2 articles, the profit made is :

1. 40%

2. 20%

3. 25%

4. 50%

A fruit-seller sells 4 oranges for ₹ 3, gaining 50%. Find :

(i) C.P. of 4 oranges.

(ii) C.P. of one orange.

(iii) S.P. of one orange

(iv) profit made by selling one orange

(v) number of oranges need to be bought and sold in order to gain ₹ 24.