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A3. Series / श्रृंखला

6 real exam-style MCQs with Answer + Explanation + Trick (Option B).

Topic Overview / विषय परिचय

This chapter is high-scoring in SSC GD and often appears in short questions.
Goal: identify the pattern quickly and avoid overthinking.
Practice with timer: 30–40 seconds per question.

Important Rules / Formulae / महत्वपूर्ण नियम

  • Check difference first ( + / − ).
  • Then check multiply/divide (×2, ×3, ÷2).
  • For alphabet series use positions A=1 … Z=26 and check jumps.
Golden rule: Diagram बनाओ → options eliminate → फिर final answer.

Professor Style Explanation / प्रोफेसर स्टाइल समझाइए

Series में 3 steps: (1) difference (2) ratio (3) special pattern like squares/cubes.
अगर series alternating हो (odd-even separately), तो odd terms और even terms अलग देखो.
एक बार pattern confirm हो जाए तो next term निकालना आसान.

Practice MCQs (6) / अभ्यास प्रश्न

Answers are hidden — click “Show Answer + Explanation + Trick”.

Q1. 2, 4, 8, 16, ?
Answer: D
Explanation: Multiply by 2 each time.
Trick: ×2 series जल्दी पकड़ो.
Q2. 1, 4, 9, 16, ?
Answer: B
Explanation: Perfect squares: 1²,2²,3²,4² → 5²=25.
Trick: Squares पहचानो.
Q3. 3, 7, 15, 31, ?
Answer: C
Explanation: ×2 +1 pattern: 31×2+1=63.
Trick: ×2±1 common.
Q4. 5, 10, 20, 40, ?
Answer: C
Explanation: Each term ×2 → 80.
Trick: Geometric (×2).
Q5. 2, 6, 12, 20, ?
Answer: B
Explanation: Pattern n(n+1): 1×2=2,2×3=6,3×4=12,4×5=20 → 5×6=30.
Trick: Gap 4,6,8... दिखे तो n(n+1) try.
Q6. A, C, E, G, ?
Answer: B
Explanation: Alphabet positions +2: A(1),C(3),E(5),G(7) → I(9).
Trick: Alphabet jump size देखो.
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