Correct option is B
The series: 439, 503, 628, 844, ?,
Calculate the Differences
503 - 439 = 64
628 - 503 = 125
844 - 628 = 216
Observing the Pattern
The differences between terms appear to be following a pattern of increasing perfect cubes:
43 = 64
53 = 125
63 = 216
If this pattern continues, the next difference should be
73 = 343
Adding 343 to the last term in the series:
844+343=1187
Conclusion The number that fits the series is: (b) 1187