Reduce my work burden to give the rent.
A silver selling person agreed to give each day's rent to his landlady by giving one inch of silver bar every day. He decided to give first day 1 inch second day taking back the first inch and giving 2 inch bar. Next day he will give both to make 2+1=3 inch for third day.. So what is the minimum number of silver bar pieces needed to give for a month having 31 days?
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You didn't mention that the only lengths available to him were powers of 2. The answer could have been 1.
Namely, 1 31 inch length.