If John sells his bicycle for ₹ 637, he will suffer a loss of 9%. For how much should it be sold if he desires a profit of 5% ?

A man sells a radio set for ₹ 605 and gains 10%. At what price should he sell another radio of the same kind in order to gain 16% ?

Identical pens are bought at 10 for ₹ 80. If these pens are sold at 25% profit; the S.P. per pen is :

1. ₹ 6

2. ₹ 10

3. ₹ 12

4. ₹ 8

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