• A) 40
• B) 42
• C) 44
• D) 48

Answer: B

Explanation: Differences are +4, +6, +8, +10; next difference is +12 → 30 + 12 = 42.

• A) 162
• B) 243
• C) 324
• D) 729

Answer: B

Explanation: Each term is multiplied by 3 (geometric progression). 81 × 3 = 243.

• A) 18
• B) 20
• C) 21
• D) 24

Answer: C

Explanation: Fibonacci: each term is the sum of the two before it. 8 + 13 = 21.

• A) 2
• B) 4
• C) 6
• D) 0

Answer: B

Explanation: Each term is half the previous. 8 ÷ 2 = 4.

• A) 189
• B) 191
• C) 193
• D) 190

Answer: B

Explanation: Pattern: ×2 + 1. 95 × 2 + 1 = 191.

• A) 216
• B) 225
• C) 256
• D) 289

Answer: B

Explanation: Perfect squares: 11², 12², 13², 14² → next is 15² = 225.

• A) 15
• B) 17
• C) 19
• D) 21

Answer: B

Explanation: Prime numbers in order. After 13 comes 17.

• A) 12
• B) 14
• C) 16
• D) 30

Answer: B

Explanation: Alternating ÷2 and +2: 100÷2=50, +2=52, ÷2=26, +2=28, ÷2=14.

• A) 84
• B) 98
• C) 112
• D) 128

Answer: C

Explanation: Each term doubles. 56 × 2 = 112.

• A) 59
• B) 69
• C) 79
• D) 89

Answer: C

Explanation: Each term ≈ previous × 2 + 1: 4×2+1=9, 9×2+1=19, 19×2+1=39, 39×2+1=79.

• A) 30
• B) 36
• C) 49
• D) 64

Answer: B

Explanation: Squares of 1, 2, 3, 4, 5 → next is 6² = 36.

• A) 20
• B) 22
• C) 24
• D) 26

Answer: C

Explanation: Tribonacci-style: each term is sum of previous three. 4+7+13=24.

• A) 0
• B) 1
• C) 2
• D) 6

Answer: B

Explanation: ÷3 each step: 3÷3=1.

• A) 35
• B) 37
• C) 39
• D) 41

Answer: B

Explanation: Differences +3,+5,+7,+9 → +11 → 26+11=37.

• A) 100
• B) 125
• C) 216
• D) 343

Answer: B

Explanation: Cubes: 1³, 2³, 3³, 4³ → 5³=125.

• A) 52
• B) 55
• C) 58
• D) 61

Answer: B

Explanation: Differences +3, +6, +9, +12 → +15 → 40+15=55.

• A) DW
• B) EV
• C) FU
• D) ET

Answer: A

Explanation: First letter advances A→B→C→D; second retreats Z→Y→X→W → DW.

• A) J
• B) A
• C) S
• D) O

Answer: A

Explanation: First letters of months: Jan, Feb, Mar, Apr, May, Jun → Jul (J).

• A) S
• B) R
• C) Q
• D) P

Answer: B

Explanation: Skip one letter backward in the alphabet: Z, X, V, T, R.

• A) DFH
• B) DGI
• C) EFH
• D) FGI

Answer: A

Explanation: Each group shifts all three letters forward by one: A→D, C→F, E→H.

• A) LM
• B) MN
• C) NO
• D) OP

Answer: B

Explanation: Pairs of consecutive letters with one letter skipped between pairs: AB (skip C) DE … → MN.

• A) EBUB
• B) EBTA
• C) DATB
• D) CZSZ

Answer: A

Explanation: Shift each letter +1: D→E, A→B, T→U, A→B → EBUB.

• A) EQ
• B) FL
• C) IR
• D) KO

Answer: C

Explanation: EQ, FL, KO are +5 letter pairs (E+5=Q, etc.). IR is +6 (I→R).

• A) T
• B) U
• C) V
• D) W

Answer: B

Explanation: Skip one letter: M, (N), O, (P), Q, (R), S, (T), U.

• A) W23
• B) V22
• C) U21
• D) W22

Answer: A

Explanation: Letter steps back; number is alphabet position.

• A) SILENT
• B) ENLIST
• C) INLETS
• D) TINSEL

Answer: A

Explanation: LISTEN is a classic anagram of SILENT.

• A) Road
• B) Garage
• C) Driver
• D) Engine

Answer: B

Explanation: A book is stored in a library; a car is stored in a garage.

• A) Paper
• B) Pen
• C) Novel
• D) Desk

Answer: B

Explanation: Tool relationship: painter uses a brush; writer uses a pen.

• A) Speed
• B) Direction
• C) Needle
• D) Hiking

Answer: B

Explanation: Odometer measures mileage; compass indicates direction.

• A) Fish
• B) Frog
• C) Pond
• D) Egg

Answer: B

Explanation: Metamorphosis: immature form to adult form.

• A) Triangle
• B) Square
• C) Circle
• D) Cube

Answer: D

Explanation: Triangle, square, circle are 2D shapes; cube is 3D.

• A) Film
• B) Lens
• C) Image
• D) Light

Answer: C

Explanation: Microphone captures sound; camera captures an image.

• A) Wheel
• B) Car
• C) Fuel
• D) Road

Answer: B

Explanation: CPU is the core processing unit of a computer; engine is the core power unit of a car.

• A) Availability
• B) Integrity
• C) Latency
• D) Throughput

Answer: B

Explanation: Encryption protects confidentiality; checksums detect corruption (integrity).

• A) Pod
• B) Host
• C) Cluster
• D) Image

Answer: B

Explanation: Subnet segments a network; container runs on a host OS/kernel.

• A) CPU register / faster tier
• B) Disk
• C) Network
• D) GPU only

Answer: A

Explanation: Each layer is faster storage closer to the compute unit.

• A) All architects write code
• B) Some people who write code are architects
• C) No architects write code
• D) All architects are developers

Answer: B

Explanation: Architects in the 'some developers' group write code, so some code writers are architects. We cannot conclude all architects write code or are developers.

• A) Some open tickets are not ignored
• B) All open tickets are ignored
• C) No open tickets exist
• D) All tickets are critical

Answer: A

Explanation: Open tickets that are critical bugs cannot be ignored, so at least some open tickets are not ignored.

• A) Deploy is postponed
• B) Deploy happened on time
• C) It will not rain tomorrow
• D) Postponement causes rain

Answer: A

Explanation: Modus ponens: rain → postpone; rain is true, so postpone follows.

• A) Auto-scale definitely triggered
• B) Auto-scale definitely did not trigger
• C) We cannot conclude whether auto-scale triggered
• D) Latency will exceed 200 ms soon

Answer: C

Explanation: Affirming the antecedent fails: low latency means the sufficient condition for scaling was not met, but scaling could still happen for other reasons.

• A) Valid
• B) Invalid — affirming the consequent
• C) Invalid — denying the antecedent
• D) A tautology

Answer: B

Explanation: Oddness does not imply primality (9 = 3×3). This is the affirming-the-consequent fallacy.

• A) Build failed
• B) Build passed
• C) Both failed
• D) Nothing can be concluded

Answer: A

Explanation: Disjunctive syllogism: (B ∨ T); ¬T ⊢ B.

• A) It was tested
• B) It was not tested
• C) Testing is optional
• D) Production is untested

Answer: A

Explanation: Contrapositive: production → tested.

• A) Some alerts should be tuned
• B) All alerts are false
• C) No tuning needed
• D) All alerts are true

Answer: A

Explanation: Some alerts fall in the 'false positive' set that requires tuning.

• A) L9T
• B) L8T
• C) K9S
• D) J7R

Answer: A

Explanation: Apply +1 to each character: K→L, 8→9, S→T.

• A) lake
• B) data
• C) pipeline
• D) storage

Answer: B

Explanation: Prefix 25 is shared → 'data'.

• A) OFVSBM
• B) MDTZQK
• C) OFURBM
• D) NEURAL

Answer: A

Explanation: Shift each letter forward by one.

• A) 1100
• B) 1101
• C) 1011
• D) 1110

Answer: B

Explanation: 13 = 8+4+1 = 1101₂.

• A) 10
• B) 14
• C) 24
• D) 20

Answer: A

Explanation: 3 # 2 = 6, then 4 @ 6 = 10.

• A) URYYB
• B) IFMMP
• C) KHOOR
• D) GRZZB

Answer: A

Explanation: H→U, E→R, L→Y, L→Y, O→B.

• A) E
• B) F
• C) G
• D) 15

Answer: B

Explanation: 15₁₀ = F₁₆.

• A) Grandfather
• B) Grandmother
• C) Uncle
• D) Father

Answer: A

Explanation: A is parent of B; B is parent of C → A is grandfather of C.

• A) Sam
• B) Sam's brother
• C) Sam's husband or wife's brother
• D) Sam's father

Answer: C

Explanation: Mother's only son-in-law is the husband of her daughter (or son's wife's brother in some puzzles)—typically Sam's husband if Sam is female, or the man married to Sam's sister. Standard answer: Sam's husband.

• A) Brother
• B) Sister
• C) Sibling
• D) Cousin

Answer: C

Explanation: X and Y share parents; Y and Z share parents → X and Z are siblings.

• A) A is uncle of C
• B) A is grandfather of C
• C) A is father of B who is sister of C
• D) C is aunt of A

Answer: C

Explanation: A is father of B; B is sister of C.

• A) Uncle
• B) Cousin
• C) Nephew
• D) Brother

Answer: A

Explanation: Maternal uncle.

• A) 10 m
• B) 14.14 m
• C) 20 m
• D) 15 m

Answer: B

Explanation: Right triangle: √(10²+10²) = √200 ≈ 14.14 m.

• A) North
• B) South
• C) West
• D) East

Answer: C

Explanation: East → South (right once) → West (right twice).

• A) 10 km
• B) 12 km
• C) 14 km
• D) 2 km

Answer: A

Explanation: 6-8-10 Pythagorean triple.

• A) South-east
• B) North-east
• C) South-west
• D) North-west

Answer: A

Explanation: From A (north of B), B is south; C is east of B → south-east of A.

• A) North-East
• B) 53° North of East
• C) Both A and B describe it
• D) South-West

Answer: C

Explanation: 3-4-5 triangle; arctan(4/3) ≈ 53° north of east.

• A) A
• B) B
• C) D or E (one of the remaining)
• D) Cannot be determined without more info

Answer: D

Explanation: Positions _ _ _ _ _. C at pos 1. A not at 1 or 5. B right of A. Several arrangements remain for D/E at the right end.

• A) D
• B) E
• C) F
• D) Depends on clockwise numbering

Answer: D

Explanation: Circular seating with 'two seats right' is ambiguous without a fixed numbering direction—classic under-specified puzzle.

• A) 18
• B) 19
• C) 20
• D) 21

Answer: A

Explanation: Sam is counted in both ranks: total = 7 + 12 - 1 = 18 people.

• A) T2, T1, T3
• B) T1, T2, T3
• C) T3, T1, T2
• D) T1, T3, T2

Answer: B

Explanation: T3 last eliminates C. T2 after T1 eliminates A. D has T3 before T2 done—invalid. Only T1, T2, T3 works.

• A) Y, X, Z
• B) X, Y, Z
• C) Y, Z, X
• D) Z, Y, X

Answer: A

Explanation: Y before Wed, X Wed, Z Fri.

• A) Box labeled Apples
• B) Box labeled Oranges
• C) Box labeled Mixed
• D) Any box works equally

Answer: C

Explanation: Open 'Mixed' (mislabeled): you draw a fruit proving pure apple or orange; use wrong labels on others to deduce the rest.

• A) Yes
• B) No — they contradict
• C) Only if both lie
• D) Only if both tell truth

Answer: B

Explanation: Statement (1) implies one liar total; (2) implies two liars—cannot both describe the same pair consistently.

• A) 1
• B) 2
• C) 3
• D) 4

Answer: B

Explanation: Split 3-3-2: weigh 3 vs 3; if equal, weigh 2; else weigh 1 vs 1 within heavy group → 2 weighings.

• A) A
• B) B
• C) D
• D) Cannot tell

Answer: C

Explanation: D > A > B > C.

• A) Turn one on 5 minutes, off; turn second on; enter—lit=second, warm-off=first, cold-off=third
• B) Turn all on at once
• C) Impossible in one visit
• D) Flip randomly

Answer: A

Explanation: Use bulb heat: on, warm-off, cold-off identifies all three with one room entry.

• A) 0°
• B) 7.5°
• C) 15°
• D) 30°

Answer: B

Explanation: Hour hand past 3: 97.5°; minute at 90° → 7.5°.

• A) 2
• B) 3
• C) 4
• D) 5

Answer: B

Explanation: 4-4-4 split; up to 3 weighings classic—actually 12 balls one heavy: 4 vs 4, then 2 vs 2, then 1 vs 1 = 3. For 3^k >= 12, k=3 → B.

• A) Monday
• B) Wednesday
• C) Friday
• D) Thursday

Answer: B

Explanation: Wednesday at 99.2% is materially below the cluster near 99.8–99.9%.

• A) 28
• B) 30
• C) 32
• D) 34

Answer: A

Explanation: Let c be correct, w wrong: c+w=36, 2c-0.5w=52. Substitute w=36-c: 2c-0.5(36-c)=52 → 2.5c=70 → c=28… Recalc: 2c - 0.5(36-c) = 52 → 2c -18 +0.5c = 52 → 2.5c = 70 → c=28. Check: 28 correct, 8 wrong, 4 blank: 56-4=52. 28 correct, 8 wrong, 4 blank → 56−4=52.

• A) 10%
• B) 15%
• C) 25%
• D) 40%

Answer: A

Explanation: 0.40 × 0.25 = 0.10 = 10% of original traffic.

• A) 7
• B) 7.5
• C) 8
• D) 22

Answer: B

Explanation: Six values: middle pair 7 and 8 → median 7.5.

• A) Most users see ~40 ms; tail is heavy
• B) Everyone sees 200 ms
• C) Median equals p99
• D) System is unusable

Answer: A

Explanation: Median describes typical; p99 captures slow tail.

• A) Absolute successes may have fallen
• B) Successes definitely doubled
• C) Volume is irrelevant
• D) Rate alone proves improvement

Answer: A

Explanation: Check counts: 0.9 × 50% volume vs 0.8 × 100%.

• A) 5
• B) 6
• C) 7
• D) 8

Answer: C

Explanation: Need 1000/200 = 5 instances at 100%; with 25% headroom: 5 × 1.25 = 6.25 → round up to 7.

• A) Rollback v2 immediately without analysis
• B) Reproduce with v2 and cold cache in staging
• C) Delete all logs
• D) Disable monitoring

Answer: B

Explanation: Isolate the interaction (version × cache state) before changing production.

• A) Hypothetical syllogism (transitivity)
• B) Converse error
• C) Denying the antecedent
• D) None

Answer: A

Explanation: Chain of implications: p→q and q→r gives p→r.

• A) Many keys collide into the same bucket
• B) The table is empty
• C) Keys are sorted
• D) Load factor is low

Answer: A

Explanation: Collision chains degrade to linear search in a bucket.

• A) Always pick SLA
• B) Quantify outage cost vs delayed revenue; decide on expected value
• C) Always ship early
• D) Flip a coin

Answer: B

Explanation: Trade-off reasoning uses expected cost/benefit, not absolutes.

• A) 99.9%
• B) 99.8%
• C) 99.99%
• D) 100%

Answer: B

Explanation: 0.999 × 0.999 ≈ 0.998 = 99.8%.

• A) Fix failed
• B) Reporting is categorical; proportion can stay if volume changed or mis-tagged
• C) DB cannot have bugs
• D) UI bugs became DB

Answer: B

Explanation: Percentages shift with denominator; misclassification and new bugs matter—read charts carefully.

• A) Shortest job first: 1, 3, 9
• B) Longest first
• C) Random
• D) 9, 3, 1

Answer: A

Explanation: SJF minimizes average waiting time for known burst times.

• A) 0
• B) 1
• C) 2
• D) 3

Answer: B

Explanation: Need 2 of 3 for majority; one node may fail.

• A) Team fixes faster but stability worsened
• B) System is perfect
• C) MTTR is useless
• D) Fewer incidents

Answer: A

Explanation: Faster recovery does not imply fewer failures.