655 439 314 250 223 (?)
(1) 205
(2) 210
(3) 195
(4) 190
(5) None of these

• 655-439=216 which is 6^3
  439-314=125 which is 5^3
  314-250=64 which is 4^3
  250-223=27 which is 3^3
  continuing the same fashion of predicting 2^3 which equals to 8 to be the next difference,
  223-215=8 which is 2^3.
  So,the answer is 215 and therefore option (5) None of these
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