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Select the number from among the given options that can replace the question mark (?) in the following series. 63, 78, 108, 153, ?
Question

Select the number from among the given options that can replace the question mark (?) in the following series.
63, 78, 108, 153, ?

A.

185

B.

213

C.

193

D.

207

Correct option is B

Analyzing the series:
63,78,108,153,?
The differences:
78-63=15
108-78=30
153-108=45
The differences increase by 15 each time:
153+60=213
Therefore, the correct answer is (b) 213.


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