RRB PREP
NTPC ALP Group D

Logical Reasoning for RRB Exams

Coding-Decoding

Tips & Tricks

  • • Alphabet Position: Remember A=1, B=2, ..., Z=26 (EJOTY: 5, 10, 15, 20, 25)
  • • Reverse Position: A=26, B=25, ..., Z=1 (Sum of positions = 27)
  • • Opposite Pairs: A-Z (Azad), B-Y (Boy), C-X (Crux), D-W (Dew), ...
  • • Patterns: +1/+1, +1/-1, Reverse order, Cross pattern

Number & Alphabet Series

Common Patterns

  • • Difference Series: Constant difference, Increasing/Decreasing difference
  • • Product/Division Series: ×2, ×3, ÷2, ÷3
  • • Square/Cube Series: n², n³, n²±1, n³±1
  • • Prime Number Series: 2, 3, 5, 7, 11, ...
  • • Combination Series: (×2 + 1), (×3 - 2), etc.

Analogy & Classification

Analogy (Similarity)

A : B :: C : ? (Relationship between A and B applies to C and ?)

  • • Types: Word Analogy (Synonyms, Antonyms, Capital-Country), Number Analogy, Letter Analogy

Classification (Odd One Out)

Identify the item that is different from the rest.

  • • Check for Prime/Composite, Square/Cube, Vowel/Consonant, Meaningful words

Blood Relations

Key Relations

  • • Paternal: Father's side (Uncle = Chacha/Tau)
  • • Maternal: Mother's side (Uncle = Mama)
  • • Spouse: Husband/Wife
  • • Siblings: Brother/Sister
  • • Tip: Draw a family tree using symbols (+ for Male, - for Female, = for Spouse, | for Generation gap)

Test Your Knowledge

30 random questions • 1 minute per question