A shopkeeper gives a full bottle of soft drink in return for five empty bottles. A guy has 77 empty bottles and he can use them to get full soft drink bottles.

**How many filled bottles will he be able to collect?**

Check your answer:- Click here to See Solution

15+2 empty bottles=3 filled +2 empty bottles

3+2 empty bottles=1 filled bottle

i.e. total filled bottle are 15+3+1=19