Series — Formula Sheet
CAT · Data Interpretation & Logical Reasoning
Free Series formula sheet for CAT Data Interpretation & Logical Reasoning 2026 — all important formulas, equations, and constants for quick reference.
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Important formulas and equations from Series for CAT Data Interpretation & Logical Reasoning.
Formulas — Series
Prime Number Series
Prime sequence: 2, 3, 5, 7, 11, 13, 17, 19, 23...Difference Series
General term for constant 2nd difference: aₙ = an² + bn + cnth term calculation: Solve system T₁ = a + b + c, T₂ = 4a + 2b + c, T₃ = 9a + 3b + cProduct Series
Constant ratio: aₙ₊₁ = aₙ × rVariable ratio: aₙ₊₁ = aₙ × rₙ (where rₙ follows a pattern)Mixed Series
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