Question
58Â Â Â Â Â 69Â Â Â Â Â Â 56 Â Â Â Â Â Â ?Â
     54       73 What should come in place of question mark ‘?’ in the following number series?Solution
58Â +Â 11 = 69 69Â -Â 13 = 56 56Â +Â 15 =Â 71 71Â -Â 17 = 54 54Â +Â 19 = 73
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