1.
What should come in place of question mark in the following series ?9 73 105 121 129 (?) 135
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By: anil on 05 May 2019 01.20 am
Clearly , 73 - 9 = 64 105 - 73 = 32 121 - 105 = 16 129 - 121 = 8 Each of the consecutive difference is getting reduced by half. Hence , next difference must be 4 .
i.e. x - 129 = 4
x = 133
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i.e. x - 129 = 4
x = 133