there is one octagon and numbers given to its side from left to right as follow: 5, 30, 6, 60, 10, ?, 9, and 45
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there is one octagon and numbers given to its side from left to right as follow: 5, 30, 6, 60, 10, ?, 9, and 45. Find the side marked by ?

Answer:

the numbers given on north, south, west and east sides of octagon are multiplication of neigbours,

So ?=9×10=90

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