🧩 Question Bank — Reasoning / Mental Ability

Scope

Every verbal & logical reasoning question from the 7 papers — series, coding-decoding, blood relations, directions, analogy, odd-one-out, syllogisms, Venn/set problems, clocks and figure items. Quantitative questions are in the companion bank → Maths-Numerical-Aptitude. 126 questions, grouped by type. Ans = official Series-A key; solved logically and matches the key except for the flagged items (WO·Q51, WO·Q52, LA·Q42).

Paper codes: WO · WG · IN · JA · GD · LA · SF


1. Number Series

SourceQuestionOptionsAnsLogic
WO · Q4940, 20, 20, 30, ?, 150A) 45 B) 90 C) 30 D) 60D×0.5, ×1, ×1.5, ×2, ×2.5 → 30×2 = 60.
WO · Q50Wrong number: 729, 243, 182, 27A) 729 B) 243 C) 182 D) 27C÷3 chain → 81 expected, not 182.
WG · Q2716, 33, 100, 401, ?A) 525 B) 1291 C) 1331 D) 2006D×2+1, ×3+1, ×4+1, ×5+1 → 2006.
WG · Q3228, 32, 41, 57, ?A) 28 B) 82 C) 156 D) 981B+2², +3², +4², +5² → 57+25 = 82.
WG · Q451, 9, 25, 49, ?, 121A) 100 B) 91 C) 64 D) 81DSquares of odd numbers → 9² = 81.
WG · Q467, 21, 63, ?, 567, 1701A) 189 B) 136 C) 111 D) 191A×3 each → 189.
WG · Q472, 9, 28, 65, ?A) 130 B) 100 C) 110 D) 126Dn³+1 → 5³+1 = 126.
WG · Q4810, 11, 15, 24, 40, ?A) 65 B) 60 C) 55 D) 50A+1², +2², +3², +4², +5² → 65.
WG · Q494, 7, 12, 19, 28, ?A) 49 B) 36 C) 30 D) 39D+3, +5, +7, +9, +11 → 39.
IN · Q713, 3, 13, 81, 603, ?A) 5291 B) 6691 C) 5491 D) 4891C×(2n−1) + (2n)² → 603×9+64 = 5491.
JA · Q311, 9, 35, 99, 225, ?A) 375 B) 441 C) 451 D) 299BSuccessive differences build to +216 → 441.
GD · Q503, 6, 18, 72, ?A) 360 B) 600 C) 720 D) 840A×2, ×3, ×4, ×5 → 72×5 = 360.
GD · Q514, 4, 8, 12, 20, 32, ?A) 44 B) 48 C) 52 D) 56CFibonacci-type (sum of previous two) → 20+32 = 52.
GD · Q521, 7, 19, 37, 61, ?A) 87 B) 89 C) 91 D) 93C+6, +12, +18, +24, +30 → 91.
GD · Q534, 18, 48, 100, 180, ?, 448A) 224 B) 294 C) 344 D) 348B2nd differences rise by 6 → next term 294.
LA · Q415, 11, 23, 47, 95, ?A) 189 B) 191 C) 187 D) 193B×2+1 → 95×2+1 = 191.
LA · Q423, 8, 15, 24, 35, ?A) 46 B) 48 C) 49 D) 50A ⚠n²−1 (or n(n+2)) gives 48 = option B; official key marks A (46) — likely a key/OCR error.
LA · Q431, 3, 6, 10, 15, ?A) 18 B) 20 C) 21 D) 22CTriangular numbers (+6) → 21.
SF · Q57121, 130, 148, ?, 256A) 184 B) 166 C) 196 D) 175A+9, +18, +36, +72 → 148+36 = 184.
SF · Q5812, 6, 6, 9, 18, ?A) 54 B) 36 C) 27 D) 45D×0.5, ×1, ×1.5, ×2, ×2.5 → 18×2.5 = 45.
SF · Q5922, 23, 27, 36, ?, 77A) 47 B) 52 C) 45 D) 54B+1², +2², +3², +4² → 36+16 = 52.
SF · Q608, 7, 12, 33, 128, ?A) 512 B) 384 C) 540 D) 635D×1−1, ×2−2, ×3−3, ×4−4, ×5−5 → 635.

2. Letter / Alphabet Series

SourceQuestionOptionsAnsLogic
WO · Q51A, C, F, J, O, __ (next three)A) U,B,J B) V,C,K C) T,A,H D) U,A,MD ⚠Gaps +2,+3,+4,+5… give U, B, J (option A); official key marks D — treat as ambiguous.
WO · Q52Wrong term: BDF, EGI, HJL, KMP, NPRA) EGI B) HJL C) KMP D) NPRD ⚠Each triplet should step +2,+2 → KMP breaks it (should be KMO); official key marks D.
JA · Q32C, E, K, Q, W, ?A) C B) D C) E D) FA+2,+6,+6,+6,+6 → 29 wraps to C.
JA · Q33A, D, I, P, Y, ?A) I B) J C) K D) LBPositions 1,4,9,16,25 (squares); 36 wraps → J.
IN · Q72Fill: a d k _ / a d _ k / a d f k _ …A) c,f,c,f,c B) c,f,c,d,c C) c,f,d,f,c D) c,f,c,d,fBCompleting the repeating a-d-f-k block → c,f,c,d,c.
LA · Q44Z, X, U, Q, L, ?A) G B) F C) I D) JB−2, −3, −4, −5, −6 → F.
LA · Q45AZ, BY, CX, DW, ?A) EV B) EU C) EW D) DVA1st +1 (A→E), 2nd −1 (Z→V) → EV.
LA · Q46A, C, B, E, D, H, ?A) F B) G C) E D) IB+2, −1, +3, −1, +4, −1 → G.

3. Coding – Decoding

SourceQuestionOptionsAnsLogic
WO · Q53DELHI = WVOSR → MUMBAI = ?A) NFNYZR B) NHNYUR C) NFNZYR D) NHNUYRALetter-complement (27−x) → NFNYZR.
WG · Q33FIRE = DGPC → last letter of SHOT?A) Q B) R C) S D) TBEach −2; T−2 = R.
WG · Q34SUMMER = RUNNER → WINTER = ?A) SBVGTY B) VIOUER C) WALKER D) KNNHYTBShift pattern −1,0,+1,+1,0,0 → VIOUER.
WG · Q35PEN = 17717 → CAP = ?A) 2319 B) 4319 C) 4111 D) 1119BPositional-digit cipher → 4319.
WG · Q36A=1, B=3… (odd numbers) → value of HONEY?A) 132725747 B) 152927947 C) 152927949 D) 132725745C15-29-27-9-49 → 152927949.
WG · Q37TAPE = SUZBOQDF → MOCK = ?A) LOPQBCKL B) MOPQDELM C) KNNPBEBL D) LNNPBDJLDEach letter → (prev, next) → LNNPBDJL.
WG · Q40MOHAN = 39-45-24-3-42 → RAGHU = ?A) 54-2-21-16-42 B) 36-2-14-24-42 C) 54-3-21-24-63 D) 36-3-14-16-63CPosition × 3 → 54-3-21-24-63.
IN · Q73BRAIN = TPKDC → MINDS = ?A) UPOKF B) NPOKF C) TPOKF D) ZPOKFASame positional map → UPOKF.
IN · Q79SMART=96, MIND=56 → PRO = ?A) 55 B) 56 C) 57 D) 58DLetter-sum + (length)²: 49 + 3² = 58.
JA · Q34Reverse order + vowels→position; BALLOON→N1515LL1B; MONDAY = ?A) Y1DN15M B) M1DN15Y C) Y15DN1M D) M15DN15YAReverse YADNOM, vowels→positions → Y1DN15M.
GD · Q36Relation-code (P%Q)#(R$S), % = father, # = mother, $ = brother → P to R?A) Father B) Grandfather C) Uncle D) BrotherBP father of Q, Q mother of R → Grandfather.
GD · Q54CAT=24, DOG=26 → BAT = ?A) 21 B) 23 C) 25 D) 27BSum of letter positions: 2+1+20 = 23.
GD · Q55PEBBLE = RCFXRY → CODING = ?A) EMHETA B) EQFJPK C) EQLHNR D) EQJHMRA+2, −2, +4, −4, +6, −6 → EMHETA.
GD · Q56MANGO=25341, GOAT=4156 → TANGO = ?A) 65341 B) 65321 C) 51346 D) 65143AT=6,A=5,N=3,G=4,O=1 → 65341.
LA · Q47COMPUTER = FRPSXWHU → SCIENCE = ?A) VFLHQFH B) VFNHQFH C) VFJHQFH D) UFLHQFHAEach +3 → VFLHQFH.
LA · Q48DOG = WLT → CAT = ?A) XZG B) XZK C) XZL D) YZLALetter-complement (27−x) → XZG.
LA · Q51A+B = mother, A−B = brother, A×B = father → P−Q×R+S means?A) P maternal uncle of S B) P paternal uncle of S C) P father of S D) P brother of SBP brother of Q, Q father of R → P is paternal uncle in that line.
SF · Q34WOMEN = EOMNW → APPLE = ?A) EALSP B) AELPP C) LPPEA D) EALPPCPositional re-order [4,2,3,5,1] → LPPEA.
SF · Q35CHANGE=BDFHIO, AMEND=BEFNO → SHIFT = ?A) GIJTU B) TFHIS C) TJGU D) FHSITASort letters then +1 each: FHIST→GIJTU.
SF · Q36RAM=16, DAM=9 → DREAMS = ?A) 36 B) 30 C) 28 D) 32B½ × (sum of positions): 60/2 = 30.
SF · Q61BEAR=AFBQ, LION=KJPM → KITE = ?A) JJUD B) LJUF C) FJSS D) LUFJA−1, +1, +1, −1 → JJUD.
SF · Q62CANDLE = 13451214 → LIGHT = ?A) 8792012 B) 7891220 C) 9812720 D) 1297820BSort letters, write positions: GHILT = 7-8-9-12-20.

4. Blood Relations

SourceQuestionOptionsAnsLogic
WO · Q56"Daughter of the only son of my grandfather" → she is Ram's?A) Sister B) Sister-in-law C) Mother D) AuntAGrandfather's only son = Ram's father → his daughter = sister.
WG · Q41A,B brothers; C,D sisters; A's son is D's brother → B to C?A) Father B) Son C) Uncle D) BrotherCD & C are A's daughters → B (A's brother) is their uncle.
WG · Q42"Her mother is the only daughter of my mother-in-law" → man is the lady's?A) Father B) Son C) Uncle D) BrotherAOnly daughter of mother-in-law = his wife → lady is his daughter → father.
WG · Q43Family P,Q,R,S,T,U — relationship of R and T?A) Father B) Son C) Uncle D) BrotherAR is parent of S (T's brother) & grandfather of Q → R is T's father.
WG · Q44A mother of B; B sister of C; C married to D; E son of D → A to E?A) Sister B) Grandmother C) Daughter D) MotherBA is C's mother; E is C's son → grandmother.
IN · Q75M mother of N; N brother of O; O wife of P; P son of Q → O to Q?A) Granddaughter B) Mother C) Daughter D) Daughter-in-lawDO married to Q's son → daughter-in-law.
JA · Q36"Daughter of my father's only son's wife" → girl is his?A) Sister B) Niece C) Daughter D) MotherCFather's only son = himself; his wife's daughter = daughter.
GD · Q33"Your mother's father's only daughter is my wife" → A to B?A) Father B) Uncle C) Grandfather D) Brother-in-lawAThat "only daughter" = B's mother = A's wife → A is B's father.
GD · Q34"Your father is son of my grandfather"; "your mother is sister of my father" → P to Q?A) Cousin B) Uncle C) Brother D) NephewAParents are siblings across the two → cousins.
GD · Q356 people, 2 couples; A father of C; D brother of C; B d-i-l of E; F grandfather of D & husband of E → B to D?A) Mother B) Aunt C) Sister D) GrandmotherAB (wife of A) is mother of C & D → mother.
LA · Q52"Wife of the only son of my mother-in-law" → woman to Raj?A) Sister B) Wife C) Sister-in-law D) CousinCMother-in-law's only son = Raj's brother-in-law; his wife = sister-in-law.
SF · Q37"No siblings; that woman's father is the only son of my grandfather" → photo of?A) Her mother B) Herself C) Her cousin D) Her daughterBGrandfather's only son = her father; the woman shares that father but she has no siblings → herself.
SF · Q38"Her mother is the only daughter of my mother-in-law" → woman to Rohan?A) Wife B) Niece C) Daughter D) MotherCOnly daughter of mother-in-law = his wife → woman is his daughter.
SF · Q39Arpan son of Barkha; Barkha's sister Charu has son Dharmesh → Arpan to Dharmesh?A) Father B) Son C) Uncle D) CousinDMothers are sisters → cousins.
SF · Q40"My father is the only son of your father" (man → woman) → woman is man's?A) Sister-in-law B) Paternal aunt C) Mother D) SisterBMan's father is the woman's brother → she is his paternal aunt.

5. Direction Sense

SourceQuestionOptionsAnsLogic
WO · Q54Facing South → 90°CW, 180°ACW, 90°CW → faces?A) North B) East C) West D) SouthDS→W→E→S.
WO · Q55150 S, R 80, L 60, L 280 → shortest distance house-to-school.A) 270 B) 280 C) 290 D) NoneCNet 210 S & 200 E → √(210²+200²) = 290 m.
WG · Q2640 N, 50 E, 110 N, 50 W → position.A) 50 S B) 150 N C) 50 E D) 120 SBNet N = 150, E = 0 → 150 km North.
WG · Q2920 E, 15 N, 8 W, 15 S → E from A.A) 3 km E B) 12 km S C) 3 km N D) 12 km EDNet E = 12, N = 0 → 12 km East.
WG · Q3036 N, 9 W, 50 S, 9 E → position.A) 14 S B) 14 W C) 14 N D) 14 EANet 14 S, 0 E → 14 km South.
WG · Q50NW 30, SW 30, SE 30; turn to house → going which way?A) NE B) NW C) SE D) SWANet position is SW of home → head North-East.
IN · Q745 pm facing tower, shadow to his right; turns 180° → walks which way?A) East B) North C) South D) WestCShadow (East) on right → faces North; 180° → walks South.
JA · Q35Facing East → 135°CW, 90°ACW → faces?A) South B) SE C) SW D) EastBE→SW(225°)→SE(135°).
GD · Q41If N→W, W→S, S→E, then E→?A) North B) West C) South D) EastA90° ACW rotation → E → North.
GD · Q42N 10, R 8, L 12, L 5 → E from A.A) NE B) SE C) NW D) SWANet 22 N, 3 E → North-East.
GD · Q4315 S, left 10, left 15 → C w.r.t. house.A) 10 m E B) 10 m W C) 15 m W D) 15 m EANet S 0, E 10 → 10 m East.
GD · Q44Back to sun (evening), 15, L 10, R 5, R 10 → position. (figure-of-path)A) NE B) SE C) NW D) SWCPer official key → North-West.
LA · Q4915 E, 12 N, 15 W, 5 S → direction from start.A) North B) NW C) South D) NEANet E 0, N 7 → North.
LA · Q50Facing South → 90°CW, 180°ACW, 270°CW → faces?A) North B) East C) South D) WestAS→W→E→N.
SF · Q45Facing N → 135°ACW, 180°CW → faces?A) NW B) SE C) NE D) SWCN→SW(225°)→NE(45°).
SF · Q4757, R 76, R 57; sunset shadow to left → started walking which way?A) South B) East C) West D) NorthATwo right turns reverse heading; shadow-left ⇒ facing N on leg 3 ⇒ started South.
SF · Q4832 N, 17 S, 8 E → distance & direction.A) 13 N B) 17 NE C) 13 NE D) 17 EBNet 15 N, 8 E → √(15²+8²) = 17 km, NE.

6. Analogy

SourceQuestionOptionsAnsLogic
WG · Q28Float : Sink :: Boat : ?A) Ship B) Aeroplane C) Submarine D) JeepCBoat floats, submarine submerges.
WG · Q31Asthma : Lungs :: Conjunctivitis : ?A) Bones B) Teeth C) Eyes D) SkinCDisease → organ affected = eyes.
GD · Q29Thermometer : Temperature :: Anemometer : ?A) Wind Speed B) Altitude C) Blood Pressure D) Atmos. PressureAAnemometer measures wind speed.
GD · Q30Democracy : Vote :: Oligarchy : ?A) Elite group B) Citizens C) Constitution D) ParliamentAOligarchy = rule by an elite group.
GD · Q31Island : Ocean :: Oasis : ?A) River B) Forest C) Desert D) MountainCOasis sits within a desert.
GD · Q32Clock : Time :: Barometer : ?A) Wind Speed B) Temperature C) Humidity D) Atmos. PressureDBarometer measures atmospheric pressure.
SF · Q33HUMAN : NOSE :: FROGS : ?A) Nose B) Gills C) Skin D) LungsCFrogs also respire through skin.
SF · Q6317 : 136 :: 27 : ?A) 223 B) 269 C) 243 D) 257Cn × (sum of digits): 27×9 = 243.
SF · Q64CUBE : 36 :: CUBOID : ?A) 74 B) 36 C) 48 D) 24BBoth solids have 6 faces → 6×6 = 36.

7. Odd One Out

SourceQuestionOptionsAnsLogic
GD · Q38Odd one: 34, 54, 8, 144A) 34 B) 54 C) 8 D) 144B8, 34, 144 are Fibonacci numbers; 54 is not.
GD · Q39Odd one: 343, 729, 625, 225A) 343 B) 729 C) 625 D) 225DOthers are exact powers of a single prime; 225 = 9×25 is not.
GD · Q40Odd one: 35, 77, 91, 133A) 35 B) 77 C) 91 D) 133DPer key → 133 (7×19) breaks the intended prime pattern.
SF · Q41Odd one: Tsunami, Cyclone, Nuclear explosion, VolcanoA) Tsunami B) Cyclone C) Nuclear explosion D) VolcanoCNuclear explosion is man-made; rest are natural.
SF · Q42Odd pair: 32-18, 63-42, 77-42, 95-68A) 32-18 B) 63-42 C) 77-42 D) 95-68DDifferences 14, 21, 35 are ÷7; 95-68 = 27 is not.
SF · Q43Odd cluster: KMI, TVR, FHE, MOKA) KMI B) TVR C) FHE D) MOKCPattern +2,−4; FHE is +2,−3.
SF · Q44Odd number: 515, 732, 1725, 346A) 515 B) 732 C) 1725 D) 346C1725 is 4-digit; the others are 3-digit.

8. Syllogism · Statements & Conclusions

SourceQuestionOptionsAnsLogic
WG · Q38All dogs are cats; No cat is a bird. (I some dogs birds; II no dog is bird)A) I B) II C) Both D) NeitherBDogs ⊂ cats, cats ∩ birds = ∅ → only II.
WG · Q39Dogs⊂mammals; no mammal reptile; snakes⊂reptiles. (I no dog snake; II some snakes not mammals; III some dogs may be snakes)A) I B) I & II C) II & III D) NoneBI and II both follow; III contradicts I → I & II.
IN · Q78All scientists researchers; No researcher poet. (I no scientist poet; II some researchers are scientists)A) I B) II C) Both D) NeitherCBoth conclusions follow → Both.
JA · Q37P ≥ Q > R, R ≤ S < T, P > T → always true?A) P=S B) S<Q C) Q>T D) T>RDR ≤ S < T ⇒ T > R.
JA · Q39Govt cuts import duty on electronics. (I prices may fall; II production will stop)A) Only I B) Only II C) Both D) NeitherAI is reasonable; II is too extreme → Only I.
JA · Q40Some books fiction; All fiction popular → (I some books popular)A) Only I B) Only II C) Both D) NeitherAFiction books are popular and are books → some books popular.
LA · Q53Sharp rise in online-education platforms — valid causes?A) Only I B) Only II C) Both D) NeitherCAffordable internet & demand for flexibility are both causes → Both.
LA · Q54All teachers educated → Some educated are teachers.A) True B) False C) Can't determine D) InvalidAValid conversion (some) → True.
LA · Q58All fruits sweet; all apples fruits → all apples sweet.A) True B) False C) Can't determine D) InvalidAValid categorical chain → True.
LA · Q59A: All squares are rectangles. R: All rectangles have 4 right angles.A) Both true, R explains A B) Both true, R doesn't explain A C) A true R false D) A false R trueBBoth true, but R alone isn't the reason squares are rectangles → B.
LA · Q60Assertion–Reason (geometry pair).A)B)C)D)BPer key → both true, reason not the correct explanation.

9. Venn Diagrams · Set Problems

SourceQuestionOptionsAnsLogic
GD · Q4680 students (M40,S35,E30; pairs 15,12,10; all 5) → like exactly two subjects.A) 17 B) 20 C) 22 D) 25C(15+12+10) − 3×5 = 22.
GD · Q47Same data → like Mathematics only.A) 15 B) 18 C) 20 D) 22B40 − 15 − 12 + 5 = 18.
GD · Q48Same data → like none.A) 5 B) 6 C) 7 D) 8CUnion = 73 → 80 − 73 = 7.
GD · Q49Correct Venn: Teachers, Women, Mothers. (figure)A)B)C)D)BAll mothers are women; teachers overlap both → key B.
SF · Q53122 scientists; all-three = ½ of none → only Organic Chemistry.A) 10 B) 12 C) 15 D) 18Ball=10, none=20; only-O = 42−25−15+10 = 12.
SF · Q54500 people (S285,T215,V115…) → own S and T but not V.A) 45 B) 55 C) 90 D) 105AS∩T = 90; minus all-three 45 → 45.
SF · Q55300 books → Fiction or Hardcover but not both, not Best-seller.A) 110 B) 120 C) 140 D) 160C(F-only 70) + (H-only 70) = 140.
SF · Q56200 devs (only P = only J; only C++ 30; all 10…) → total who know Python.A) 50 B) 85 C) 105 D) 115Conly-P = 50 → total P = 50+25+20+10 = 105.

10. Clocks & Figure-based

SourceQuestionOptionsAnsLogic
SF · Q46At 9:15 minute hand faces West → at 6 pm hour hand points?A) South B) West C) East D) NorthDThe dial is rotated 180° (3-position = West), so 6-position points North.
SF · Q51Circle of 5 slices → coded number; 0 removed = ?A) 3125 B) 7776 C) 6561 D) 2401APattern resolves to 5⁵ → 3125.
GD · Q37Figures with dots — odd one out. (figure)A) I B) II C) III D) IVDPer key → Figure IV.
GD · Q45Complete the figure series. (figure)A) 1 B) 2 C) 3 D) 4BFigure-based → key B.
SF · Q49Non-verbal: pick the matching figure. (image)A)D)CFigure-based → key C.
SF · Q50Position of the dot in the "?" figure. (image)A) V0 B) V2 C) V3 D) V4DFigure-based → key D.
SF · Q52Non-verbal series (image). (image)A)D)AFigure-based → key A.
Figure/image-based items

Six questions (GD·Q37, Q45, Q49; SF·Q49, Q50, Q52) depend on diagrams that aren't reproducible as text — the official key answer is given; open the original paper to see the figure.


📊 Topic distribution

#TopicQ
1Number Series21
2Letter / Alphabet Series8
3Coding – Decoding22
4Blood Relations15
5Direction Sense17
6Analogy9
7Odd One Out7
8Syllogism · Statements/Conclusions11
9Venn Diagrams · Set Problems8
10Clocks & Figure-based7
Total~125
FAA focus

Reasoning is nearly ⅓ of every paper and the fastest section to gain marks in. High-frequency, high-yield: coding-decoding (letter-complement 27−x, ±shift, sort-then-shift, position-sum), direction sense (draw the path, then Pythagoras), blood relations ("only son/daughter" = spouse), series (check ×n / +squares / +cubes / Fibonacci), and Venn set formulas. These recur almost verbatim across papers — pure practice pays off. Companion: quantitative → Maths-Numerical-Aptitude.

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