Question
D irection: Which of the following will replace ‘?’
in the following series 10,14,’?’,199, 352, 530Solution
Second difference Is a square of Consecutive natural number in decreasing order. 10Â Â Â Â 14Â Â Â Â Â Â Â 82Â Â Â Â Â Â Â Â 199Â Â Â Â Â 352Â Â Â Â Â Â Â Â 530 Â Â Â Â Â 4Â Â Â Â Â Â Â 68Â Â Â Â Â Â Â 117Â Â Â Â Â Â Â Â Â 153Â Â Â Â Â Â Â Â Â Â 178 Â Â Â Â Â Â Â Â Â Â 64Â Â Â Â Â Â Â 49Â Â Â Â Â Â Â Â Â 36 Â Â Â Â Â Â Â Â Â Â Â 25
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