#82 How many of the opposite colored books are even when multiplied by 3? (By opposite color, I mean opposite each other on the color wheel.)
Fascinating fact: Among the living organisms other than humans, monkeys, various species of birds, fish and ground squirrels have clear vision to distinguish the colors.
Fascinating fact: Among the living organisms other than humans, monkeys, various species of birds, fish and ground squirrels have clear vision to distinguish the colors.
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