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Select the number from among the given options that can replace the question mark (?) in the following series. 126, 217, 344, ?
Question

Select the number from among the given options that can replace the question mark (?) in the following series.
126, 217, 344, ?

A.

614

B.

688

C.

470

D.

513

Correct option is D

Given: 126, 217, 344, ?
Logic: The number is perfect cube of 5, 6, 7 & 8 and  + 1 
126 = 53 + 1 
217 = 6+ 1 
344 = 73 + 1
Similarly, 
Next missing number is cube of 8 and + 1
83 + 1 = 513
Thus, correct option is (d).

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