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Find the missing number in the series? 4, 18, ?, 100, 180, 294, 448

Correct Answer: 48

Explanation:

Take a Look at this series :


 


2 3  -  2 2  =  8 - 4 = 4  


3 3  -  3 2  = 27 - 9 = 18 


4 3  -  4 2  = 64 - 16 = 48  


5 3  -  5 2  = 125 - 25 = 100  


6 3  -  6 2  = 216 - 36 = 180 


7 3  -  7 2  = 343 - 49 = 294 


8 3  -  8 2  = 512 - 64 = 448


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