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$1 + 2 + 3 = 6$
$2 + 3 + 4 = 9$
Can you explain why the total has gone up by $3$?
Can you explain the strategy for winning this game with any target?
Is there an efficient way to work out how many factors a large number has?
Draw a square. A second square of the same size slides around the first always maintaining contact and keeping the same orientation. How far does the dot travel?