What will come in place of the question mark (?) in the following number series? 11, 22, 55, 165, ?
A. 333.5
B. 577.5
C. 325.5
D. 495.5
Answer: Option B
Solution (By JKSSB Mock Tests)
The pattern is: 11×2=22, 22×2.5=55, 55×3=165. The multiplier increases by 0.5 each time. The next multiplier is 3.5. Therefore, 165×3.5=577.5.[reference:11]
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