Question
520Â Â 79Â Â 440Â Â 151Â Â Â 376Â Â
 ? What will come in place of the question mark (?) in each of the following series?Solution
520 - 212 = 79 79 + 192Â = 440 440 - 172Â = 151 151 + 152Â = 376 376 - 132Â = 207
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