Key facts

  • Mental ability questions are solved by choosing the correct representation: rule table, family graph, compass grid, seating slots, rank formula, clock...
  • Coding-decoding depends on one consistent operation across every letter, number or symbol; vocabulary meaning is usually irrelevant.
  • Blood-relation items become reliable when gender, generation, marriage, sibling and parent-child links are marked once in a clean family graph.
  • Direction and seating puzzles require orientation control: left, right, clockwise and anti-clockwise change with facing direction.
  • Ranking, calendar and clock items are arithmetic patterns based on position, remainder and angular movement, not memory-only topics.

Key Points at a Glance

  1. 1

    Mental ability questions are solved by choosing the correct representation: rule table, family graph, compass grid, seating slots, rank formula, clock angle, cube model or decision table.

  2. 2

    Coding-decoding depends on one consistent operation across every letter, number or symbol; vocabulary meaning is usually irrelevant.

  3. 3

    Blood-relation items become reliable when gender, generation, marriage, sibling and parent-child links are marked once in a clean family graph.

  4. 4

    Direction and seating puzzles require orientation control: left, right, clockwise and anti-clockwise change with facing direction.

  5. 5

    Ranking, calendar and clock items are arithmetic patterns based on position, remainder and angular movement, not memory-only topics.

  6. 6

    Cube, dice, mirror, water-image and paper-folding questions test visual consistency through faces, axes, folds and symmetry.

  7. 7

    Condition-based decision-making is rule application: compare the case with each stated condition, apply exceptions exactly and avoid fairness assumptions.

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Coding-Decoding And Alphabet Movement

Coding-decoding questions ask for the operation that turns one form into another. The operation may be a direct shift, reverse order, alphabetic sorting, vowel-consonant separation, alternate movement, position exchange, number substitution or symbol substitution. The first task is not to guess the answer; it is to identify the code family. A word such as CAT becoming FDW shows a direct +3 shift because C moves to F, A moves to D and T moves to W. A word such as PROJECT becoming CEOPRT cannot be treated as a simple shift unless every old-new pair shows the same movement; it may be a rearrangement after dropping a letter or applying another ordering rule.

Alphabet movement becomes safer when the candidate writes a small table of original letters, coded letters and movement count. If A = 1 and Z = 26, number coding may use sums, differences, products, square values or paired positions such as first plus last. Symbol coding may replace letters with shapes, but the answer still depends on one repeated rule. In Rajasthan-flavoured examples, words such as JAIPUR, KOTA or AJMER are only labels; the code must work mechanically on every letter.

Exam takeaway: first classify the code, then apply the exact same operation without exception.

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