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Which number will replace the question mark (?) in the following series:

25, 216, 49, 512, ?


1. 81
2. 729
3. 625
4. 64

1 Answer

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Best answer
Correct Answer - Option 1 : 81

The pattern follows here is:

The series are in the form of alternate squares and cubes. 

25 = 52

216 = 63

49 = 72

512 = 83

? = 92

? = 81 

Hence, the correct answer is "81".

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