A farmer bought toffees at 6 for a rupee. How many for a rupee must he sell to gain 20%?

Answer: 5
Explanation

6 toffees --->                                     1 RS

Given profit % =                               20%

=> S.P of 6 toffees =                       1.2 RS

Now consider only S.P

1.2 re-->                                       6 toffee

1 re --->?                                     Toffee

 

6/1.2 =                                          5

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