Directions: In the following number series, one of the numbers is wrong in the sense that it does not belong to the series. Find that number. 3, 4.5, 9, 22.5, 67.5, 270, 945

The pattern of the series follows multiplying by 1.5, then by 2, then by 2.5, and so on. Multiplying 3 by 1.5 gives 4.5, multiplying 4.5 by 2 gives 9, and multiplying 9 by 2.5 gives 22.5. Continuing this logic, 22.5 multiplied by 3 equals 67.5, which implies the next multiplication factor should be 3.5. Multiplying 67.5 by 3.5 gives 236.25, which means 270 is the wrong number.

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