Wheel Spokes
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An old fashioned bicycle wheel has 21 spokes. How many spaces are between the spokes – 20, 21 or 22? 
Answer is 21 spaces.
with just 1 spoke, there is one continuous space.
2 spokes devices the circular space in 2 spaces.
with 3 spokes, 3 spaces.
with 4 spokes, the space is devided into 4 90 degree pies.
..
..
..
So with 21 spokes, 21 spaces.
Your Answer
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