SSC CGL — Tier 1 — 2025 — 17 Sep 2025 — Shift II — Official Paper — Kerala PSC PYQ Practice with Answers

Correct answer (Option A):\nThe given series consists of alternate English alphabets combined with their respective numerical positions in the alphabetical order.\nAnalyzing the alphabetic component:\nB (+2) → D (+2) → F (+2) → H (+2) → J\nAnalyzing the numeric component:\n2 (+2) → 4 (+2) → 6 (+2) → 8 (+2) → 10\nCombining both components gives J10.\nOption A is correct.\n\nWhy others are wrong:\nOption B (19) lacks any alphabetic prefix and uses unrelated numerical logic.\nOption C (K10) skips to K instead of advancing by 2 positions to J.\nOption D (J9) uses the correct letter J but has an incorrect numerical value of 9 instead of 10.\n\nStudy tip:\nAlphanumeric series usually advance with parallel logic paths for both parts. Tracking the alphabetical positions from A=1 to Z=26 makes checking consistency straightforward.

Correct answer (Option A):\nThe series progresses by multiplying each consecutive term by an increasing integer and then adding an increasing integer step-by-step.\nLet us determine the exact mathematical pattern:\nStep 1: 5 × 3 + 3 = 15 + 3 = 18\nStep 2: 18 × 4 + 5 = 72 + 5 = 77\nStep 3: 77 × 5 + 7 = 385 + 7 = 392\nTo check the final term:\nStep 4: 392 × 6 + 9 = 2352 + 9 = 2361\nTherefore, the missing term is 392.\nOption A is correct.\n\nWhy others are wrong:\nOption B (402) overshoots the correct sum due to an incorrect multiplicative calculation.\nOption C (397) adds an incorrect constant value rather than adhering to the prime/odd progression or progressive factor scaling.\nOption D (385) equals exactly 77 × 5 but fails to incorporate the essential addition step (+ 7).\n\nStudy tip:\nWhen values in a sequence scale up rapidly, evaluate compound equations containing products mixed with additions or geometric differences to pinpoint the governing pattern.

Correct answer (Option B):\nSubstitute the mathematical operators indicated in the question description into the algebraic expression:\nGiven operators: B = ÷, C = +, A = ×\nExpression: 20 ÷ 5 + 6 × 2\nNow apply the standard rules of BODMAS/BOMDAS mathematical hierarchy:\nStep 1 (Division): 20 ÷ 5 = 4\nThe expression becomes: 4 + 6 × 2\nStep 2 (Multiplication): 6 × 2 = 12\nThe expression becomes: 4 + 12\nStep 3 (Addition): 4 + 12 = 16\nOption B is correct.\n\nWhy others are wrong:\nOption A (14) yields an invalid outcome by breaking standard sequencing rules or performing faulty additions.\nOption C (18) represents a calculation error where values are grouped or evaluated out of the mandatory operational order.\nOption D (20) fails to evaluate standard operator hierarchies, processing numbers in a purely linear left-to-right fashion.\n\nStudy tip:\nMathematical operator substitution puzzles always require strict observance of BODMAS precedence hierarchy. Never compute operations strictly from left to right unless permitted by equivalent precedence layers.

Correct answer (Option A):\nIn a reverse positioning alphabet scheme, the code value assigned to any letter equals 27 minus its standard forward positional index.\nLet us map each letter in the word COLD:\nC: Standard forward position is 3. Reverse position = 27 - 3 = 24\nO: Standard forward position is 15. Reverse position = 27 - 15 = 12\nL: Standard forward position is 12. Reverse position = 27 - 12 = 15\nD: Standard forward position is 4. Reverse position = 27 - 4 = 23\nAssembling the sequence gives: 24, 12, 15, 23.\nOption A is correct.\n\nWhy others are wrong:\nOption B (24, 15, 12, 23) transposes the internal positional indicators for the characters O and L.\nOption C (23, 12, 15, 22) shifts the calculated values downward by 1 unit for the outermost characters.\nOption D (24, 12, 15, 22) applies an incorrect calculation step for the final letter D.\n\nStudy tip:\nThe constant sum of a letter's standard forward position and its reverse position is always 27. Remembering this relational formula allows you to calculate reverse positions instantly without writing down the whole alphabet backward.

Correct answer (Option D):\nThis puzzle employs a direct character-to-digit substitute cipher strategy derived from the matching values of the reference words.\nLet us extract individual symbol mappings:\nFrom PLANE (47826): P = 4, L = 7, A = 8, N = 2, E = 6\nFrom CAR (189): C = 1, A = 8, R = 9\nNow compile the assigned codes for PLACE using these mapped relationships:\nP = 4\nL = 7\nA = 8\nC = 1\nE = 6\nCombining these digits in order yields 47816.\nOption D is correct.\n\nWhy others are wrong:\nOption A (47518) substitutes an unassigned digit 5 and incorrectly sets the concluding letter code to 8.\nOption B (47815) errs by concluding with the digit 5 instead of the validated code value 6 for E.\nOption C (47528) inserts numerical elements that do not correspond with the established alphanumeric sets.\n\nStudy tip:\nWhen encountering dual-word reference codes where single letters consistently match identical numbers (such as A = 8), look for a straightforward direct substitution pattern instead of manipulating alphabetical order numbers.