# Complete the series 21 , 25 , 33 , 49 , 81 , ?? , ??

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Complete the series 21 , 25 , 33 , 49 , 81 , ?? , ??
posted Apr 29, 2014

the first number in this series added with 4 answer is 25 (3rd num)and 4x2 is 8 added to 25 answer is 33 likwise the series continues the last numbers are 145,273

145, 273. Difference between the terms of the series- 4,8,16,32,64,128

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