RRB ALP CBT 1 — 16 Feb 2026 — Shift 1 — Official Paper — Kerala PSC PYQ Practice with Answers

Correct answer (Option B):\nLet us find the difference between consecutive terms in the series:\n51 - 39 = 12\n68 - 51 = 17\n90 - 68 = 22\n117 - 90 = 27\n\nThe differences are 12, 17, 22, 27, which increase by a constant value of 5 each time.\nFollowing this logic, the next difference must be:\n27 + 5 = 32\nAdding 32 to the last term:\n117 + 32 = 149\n\nWhy others are wrong:\nOptions A, C, and D do not follow this constant increase in the term-to-term differences.\n\nStudy tip:\nAlways check the first and second levels of differences in a number series to identify polynomial patterns.

Correct answer (Option C):\nThe pattern follows a shift of +15 positions for each letter in the alphabetical cycle:\nH (8) + 15 = 23 (W)\nE (5) + 15 = 20 (T)\nV (22) + 15 = 37 - 26 = 11 (K)\nO (15) + 15 = 30 - 26 = 4 (D)\n\nApplying the same +15 positional shift to IFWP:\nI (9) + 15 = 24 (X)\nF (6) + 15 = 21 (U)\nW (23) + 15 = 38 - 26 = 12 (L)\nP (16) + 15 = 31 - 26 = 5 (E)\n\nThus, the related term is XULE.\n\nWhy others are wrong:\nOptions A, B, and D result from applying incorrect letter shift counts across the positions.\n\nStudy tip:\nConvert alphabetical letters quickly to their numeric ranks (1 to 26) to handle complex positional shifts easily.

Correct answer (Option B):\nSmoking directly leads to the destruction of cilia in the upper respiratory tract. Cilia are tiny hair-like structures that help sweep away dust, pathogens, and foreign particles. Damage to these structures impairs the respiratory tract mucosal defense mechanism.\n\nWhy others are wrong:\nOptions A and C are incorrect because smoking inhibits and destroys cilia rather than promoting them. Option D is incorrect as the primary filtration barrier damaged initially resides in the upper respiratory zone.\n\nRemember:\nCilia damage from cigarette smoke is a major contributor to chronic bronchitis and smoker's cough.

Correct answer (Option A):\nThe logic behind this coding pattern is the square of the total number of letters present in the word:\nDEAR consists of 4 letters: 4² = 16\nANGEL consists of 5 letters: 5² = 25\n\nApplying the same logic to BEHAVIOR:\nBEHAVIOR consists of 8 letters: 8² = 64\n\nWhy others are wrong:\nOptions B, C, and D do not represent the square of the total number of letters in the target word.\n\nStudy tip:\nWhen codes are small perfect squares, always check the word length count as a potential base value.

Correct answer (Option D):\nLet the present age of Bunty be x years and Bubbly be (24 - x) years.\nAfter 2 years:\nBunty's age = x + 2\nBubbly's age = (24 - x) + 2 = 26 - x\n\nAccording to the problem:\nx + 2 = 3 × (26 - x)\nx + 2 = 78 - 3x\n4x = 76\nx = 19\n\nBunty's present age is 19 years.\n\nWhy others are wrong:\nOptions A, B, and C fail to satisfy the linear relation equations formed from the question parameters.\n\nStudy tip:\nSetting up a single variable linear equation saves time compared to working with two separate variables.