Question

25 stamp of equal value cost rs 750. How many stamp of same value can be bought for rs 900.

Answer 1

$$\begin{gathered} \mathrm{Number}\mathrm{of}\mathrm{stamps}\mathrm{bought}\mathrm{for}\mathrm{Rs}750=25 \\ \mathrm{Number}\mathrm{of}\mathrm{stamps}\mathrm{bought}\mathrm{for}\mathrm{Re}1=\frac{25}{750} \\ \mathrm{Number}\mathrm{of}\mathrm{stamps}\mathrm{bought}\mathrm{for}\mathrm{Rs}900=\frac{25}{750}\times 900=30 \end{gathered}$$