Question

A certain sum of money at simple interest amounts to rs.850 in 3 year and to rs925 in 4 years. What is the principal?

Answer 1

The citrate. For example: if a person has got dozens of fruits as his payment, he/she can't store fruit for long or they may rot - which means a person will have to bear a huge loss. Currency solved this problem by allowing a society as a whole to assign values[citation needed] and thus to collect goods and services effectively and to store them for later use, or to split them among minions.