Question
20Â Â Â 21Â Â Â Â 30Â Â Â Â 55Â Â Â 104Â Â
 ? What will come in place of the question mark (?) in the following series?Solution
20 + 12Â = 21 21 + 32Â = 30 30 + 52Â = 55 55 + 72Â = 104 104 + 92Â =Â 185
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