Question
18Â Â Â Â Â 45 Â Â Â Â Â 90 Â Â Â Â Â Â 235Â
    450      1125      2250 Find out the wrong number in the following number series.Solution
18 × 2.5 = 45 45 × 2 = 90 90 × 2.5 = 225 225 × 2 = 450 450 × 2.5 = 1125 1125 × 2 = 2250
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