This is a story of four boys... Chinku, Dinku, Pinku & Tinku.
One day all of them decide to save their money in a bank... they
select a bank called " ,Lena Bank "
The bank's specialty is:
In every month the money gets doubled.
In 2nd month, Chinku withdraws 100-Rs from bank...
In 3rd month, Dinku withdraws 100-Rs from bank...
In 4th month, Pinku withdraws 100-Rs from bank... &
In 5th month, Tinku withdraws 100-Rs from bank & their balance in the
bank becomes zero...
How much amount had the boys put in the bank? Here is how i worked it out Month 5 = 100 (100 is what the last person withdraws after this account is 0) Month 4 = 100/2 + 100 = 150 (after 4th person removes 100 Rs50 is left in the account) Month 3 = 150/2 + 100 = 175 (same way like above) Month 2 = 175/2 + 100 = 187.5 Month 1 = 187.5/2 + 100 = 193.75 Month 0 = 193.75 - 100 = 93.75
93.75 is the answer
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More to Think... 
