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Asked in PPSC, FPSC and other one-paper exams (compiled from unofficial resources).

Series, Patterns & Logical ReasoningNumber Series

Find the missing number in the series: $6$, $?$, $21$, $33$, $48$.

A.$10$
B.$14$
C.$12$Correct answer
D.$15$

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Quick fact: The missing number in the series is $12$.

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