Question
60Â Â Â 61Â Â Â Â 57Â Â Â 66Â Â Â
 ?      75    39 Find the missing number in the following number series:Solution
The series is: 60 + 12 = 61 61 – 22 = 57 57 + 32 = 66 66 – 42 = 50 50 + 52 = 75 75 – 62 = 39
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