Can you answer this question? The newspaper has a competition to win
an apartment. The quiz lasts for 90 days and the newspaper circulates
90,000 copies daily. In order to enter the competition, you have to
collect 10 tokens. Each newspaper every day has one token so you would
have to buy the newspaper for 10 days to be eligible to enter. How
many people can be expected to enter?

With you entry you place a bid on the apartment. The lowest unique bid
wins. ie: if only one person bids 1 penny they are the winner.

What would be a good bid?

How many people would be guessed at by how many readers and what type
of readers, what their backgrounds are like in respect to clipping out
tokens to get an apartment.  I would say a good bid would be odd
numbers around $1.50 to $2.50 because I'm sure at least someone will
enter about 100 times taking all consecutive amounts starting at 1,
however if you wanted you could always go with lim x-> -0 of 1/x

If you can I'd say befriend people who work at gas stations and have
them take the tokens out for you after the papers are clipped for
returns, then just pick numbers, no way to know for sure what is a
safe bet, unless there is research on this somewere out there.

$2.59