Correct option is D
Given: 5, 30, 25, 125, 120, 480, (…)
From 5 to 30: 5×6=30
From 30 to 25: 30−5=25
From 25 to 125: 25×5=125
From 125 to 120: 125−5=120
From 120 to 480: 120×4=480
Now, let's calculate the next term following this alternating pattern:
The next step should be subtracting 5 from 480:
480−5=475
The missing number in the series is 475.
Correct answer (d) 475.