Archive #7

Assume that you have a bike wheel with 21 spokes in total.

In between every 2 spokes is a space.

How many spaces are there on this bike wheel?

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Translate the following (i.e., say what you see):


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Your friend owes you $10,000. He does not have the money to pay you right now, but proposes two repayment methods:

1. He will pay you the $10,000 in two weeks, along with an additional $10,000 in interest.

2. He will give you one penny today and double the amount paid on the previous day for each of the next 30 days. That is, he will give you one cent today, two cents on day two, four cents on day three, eight cents on day four, etc.

Which option would you choose?

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