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Lesson 3 of 4 · Coded inequalities (A@B...)

Coded symbols

Mathematical Operations, Coded Inequalities, Missing Number · for IPMAT Indore, IPMAT Rohtak and JIPMAT

The idea of Coded inequalities (A@B...)

Statements give a chain of inequalities (directly, or through coded symbols such as A @ B for A > B), and you decide which conclusions follow for certain. Rohtak 2019 asked two (Q29, Q30) and JIPMAT 2021 one (Q10). A conclusion follows only if one chain of the statements links its two letters with every sign pointing the same way.

The exam method

  1. Chain. F ≥ V > R = L > E → F > E.JIPMAT 2021
  2. Break. H > P ≤ E: the sign turns at P, so H and R are not linked.
  3. Either-or. R ≥ S → "R = S" or "R > S".Rohtak 2019
  4. Symbol-fill. to make B < E definite through "B ? C ≤ D < E", the ? must be ≤ or =; test each option.