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Number Series Quantitative Aptitude — Study Notes & MCQ Practice 2026

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1. The Pulse Check (Difference)

Gap Analysis Primes Fibonacci

Always check the "pulse" (gap between numbers) first. Watch for "Alternate Primes" where the series skips every other prime number (e.g., 3, 7, 13, 19).

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2. The Sudden Jump

Multiplication

ร— n ยฑ k

Fractional

ร— 0.5, ร— 1

Division

รท n

Multi-Layer

Diff of Diff

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3. Shape-Shifter Logic

Square Patterns

$$ n^2 \pm n $$

Cube Patterns

$$ n^3 \pm n $$

๐ŸŒŸ Topper's Mindset

1

The 10-Second Rule: If no pattern clicks in 10s, skip and mark for review.

2

Zig-Zag Illusion: Long series (7+ terms) are usually two shuffled series.

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