Question 1

Find the odd action word (semantic field): Pick the verb that is not a cutting action.

Accepted Answer

Introduction / Context: Verb classification is often about shared semantic frames. Three verbs here describe cutting actions, while one denotes a sound typically made by birds, not a cutting operation. Given Data / Assumptions: Chop: cut into pieces with repeated blows. Slit: cut a long narrow opening. Slice: cut into thin pieces. Chirp: emit short high-pitched sounds (birds/insects). Concept / Approach: Group by action domain. Cutting verbs imply a tool and a material being divided; “chirp” involves vocalization/sound production and no cutting semantics. Step-by-Step Solution: 1) Tag Chop/Slit/Slice as cutting verbs.2) Tag Chirp as sound/utterance verb.3) The non-cutting verb “Chirp” is the odd one. Verification / Alternative check: Substitution: “Please chirp the onions” is nonsense, confirming it does not share the cutting frame. Why Other Options Are Wrong: They are all near-synonyms in the cutting family (varying in manner/shape of cut). Common Pitfalls: Avoid overthinking fine distinctions among cutting verbs; the sound verb stands apart. Final Answer: Chirp

Question 2

Find the odd domestic animal (ruminant vs non-ruminant): Choose the one that is not a ruminant herbivore.

Accepted Answer

Introduction / Context: Animal classification can use digestive physiology. Cattle, sheep, and goats are ruminants with multi-chambered stomachs for fermenting plant matter. Dogs are non-ruminants (carnivores/omnivores) and differ sharply in diet and digestion. Given Data / Assumptions: Cow: ruminant herbivore. Sheep: ruminant herbivore. Goat: ruminant herbivore. Dog: non-ruminant, carnivore/omnivore. Concept / Approach: Group by rumination (cud-chewing) apparatus. Ruminants share a foregut fermentation system and characteristic grazing diet; dogs do not. Step-by-Step Solution: 1) Label cow/sheep/goat → ruminants.2) Label dog → non-ruminant.3) Dog is the only non-ruminant → odd one out. Verification / Alternative check: Consider dentition and diet: canines vs specialized molars for grinding fibrous plants. Why Other Options Are Wrong: They share ruminant biology and herbivory. Common Pitfalls: Do not use “pet vs livestock” because goats can also be kept as pets; physiology is the firmer criterion. Final Answer: Dog

Question 3

Find the odd chemical item (state at room temperature): Select the metal that is liquid at room temperature.

Accepted Answer

Introduction / Context: Elements can be classified by state of matter at standard conditions. Most metals are solid at room temperature; mercury is famously liquid, making it an immediate outlier. Given Data / Assumptions: Iron: solid metal at room temperature. Silver: solid metal at room temperature. Gold: solid metal at room temperature. Mercury: liquid metal at room temperature. Concept / Approach: Compare physical state under standard conditions (approximately 25°C, 1 atm). Mercury’s unique liquidity among common metals distinguishes it categorically. Step-by-Step Solution: 1) Tag Fe/Ag/Au as solid.2) Tag Hg as liquid.3) The only liquid metal present is Mercury. Verification / Alternative check: Check melting points: Hg has a melting point well below room temperature, whereas Fe/Ag/Au melt far above it. Why Other Options Are Wrong: They share the “solid at room temperature” property. Common Pitfalls: Do not confuse “conductivity” (all conduct well) with state of matter; here the state is decisive. Final Answer: Mercury

Question 4

Find the odd material (element vs alloy): Choose the one that is not a pure chemical element.

Accepted Answer

Introduction / Context: Materials can be split into chemical elements versus mixtures/alloys. Zinc, silver, and platinum are elements from the periodic table; bronze is an alloy (commonly copper + tin), so it is compositionally distinct. Given Data / Assumptions: Zinc (Zn): element. Silver (Ag): element. Platinum (Pt): element. Bronze: alloy (mixture), not a single element. Concept / Approach: Check whether each name denotes a solitary atomic species (element) or a mixture. Alloys are engineered combinations with properties distinct from their constituents. Step-by-Step Solution: 1) Tag Zn/Ag/Pt as elements.2) Tag Bronze as alloy.3) Therefore, Bronze is the odd option. Verification / Alternative check: Periodic table membership confirms the element status of Zn, Ag, Pt; “bronze” does not appear as an element symbol. Why Other Options Are Wrong: They are pure elements and belong to the same class. Common Pitfalls: Do not confuse “silver color” in alloys with the element silver; naming conventions differ. Final Answer: Bronze

Question 5

Find the odd place (place of worship vs public venue): Identify the one that is not a place of worship.

Accepted Answer

Introduction / Context: Public places can be grouped by function. Three of the options are religious places of worship, while one is a secular entertainment venue. Function is the decisive attribute here. Given Data / Assumptions: Temple: place of worship. Mosque: place of worship. Church: place of worship. Theatre: venue for performances/films, not a religious site. Concept / Approach: Classify by primary social function. Religious worship vs secular entertainment creates a clear, non-overlapping partition. Step-by-Step Solution: 1) Tag temple/mosque/church as worship places.2) Tag theatre as entertainment venue.3) Theatre is the only secular venue → odd one out. Verification / Alternative check: Consider typical activities: prayer and rituals vs watching plays/movies. Why Other Options Are Wrong: They share the religious function and thus form a coherent group. Common Pitfalls: Spelling variations (theatre/theater) do not change the function. Final Answer: Theatre

Question 6

Find the odd taste option (basic tastes vs absence of taste): Select the item that denotes no taste rather than a basic taste quality.

Accepted Answer

Introduction / Context: Human gustation recognizes basic taste qualities (commonly sweet, sour, salty, bitter, umami). “Tasteless” denotes the absence of detectable taste, not a taste quality itself, providing a crisp classification boundary. Given Data / Assumptions: Sweet: basic taste. Sour: basic taste. Salty: basic taste. Tasteless: absence/minimal perception of taste. Concept / Approach: Differentiate “taste category” from “lack of taste.” The latter does not fit within the taxonomy of basic tastes and therefore stands apart. Step-by-Step Solution: 1) Tag sweet/sour/salty as basic tastes.2) Tag tasteless as absence of taste.3) The only non-taste category is “Tasteless.” Verification / Alternative check: Try substitution: “This soup tastes tasteless” reports lack of flavor, while “tastes sweet/sour/salty” reports a specific taste. Why Other Options Are Wrong: They are canonical taste qualities and belong to one semantic class. Common Pitfalls: Do not mix “bland” (low intensity) with “tasteless” (no taste perceived); the question contrasts category vs absence. Final Answer: Tasteless

Question 7

Find the odd city (state capitals vs non-capital): Choose the city that is not a state capital in India.

Accepted Answer

Introduction / Context: Indian cities can be grouped by administrative status. Three listed cities serve as state capitals; one is a major city but not a capital. Administrative role forms a clear, testable criterion. Given Data / Assumptions: Bengaluru: capital of Karnataka. Patna: capital of Bihar. Ranchi: capital of Jharkhand. Bhagalpur: important city in Bihar, not a state capital. Concept / Approach: Use official capital status. Capitals are seats of state government and typically host key administrative buildings; Bhagalpur does not have that status. Step-by-Step Solution: 1) Tag Bengaluru/Patna/Ranchi as capitals.2) Tag Bhagalpur as non-capital.3) Bhagalpur is the odd item. Verification / Alternative check: Check state associations; only Bhagalpur lacks a state-capital role. Why Other Options Are Wrong: They conform to the “state capital” class. Common Pitfalls: Do not confuse city size or prominence with administrative status. Final Answer: Bhagalpur

Question 8

Find the odd occupation (crafts vs driving service): Identify the profession that is not a traditional craft/artisan trade.

Accepted Answer

Introduction / Context: Occupations can be grouped by the nature of skilled manual craft versus service operation. Carpentry, goldsmithing, and blacksmithing are traditional artisan trades focused on fabrication. Driving is an operation/service, not a craft of shaping materials. Given Data / Assumptions: Carpenter: crafts wood into structures/objects. Goldsmith: crafts precious metals into jewelry/objects. Blacksmith: forges iron/steel hardware and tools. Driver: operates vehicles to transport people/goods. Concept / Approach: Classify by core activity: material fabrication (craft) vs transport operation (service). The artisan trades share fabrication, tools, and workshops; driving focuses on mobility and logistics. Step-by-Step Solution: 1) Group Carpenter/Goldsmith/Blacksmith as artisans.2) Identify Driver as non-artisan service.3) Therefore, Driver is the odd one out. Verification / Alternative check: Consider training artifacts: crafted products vs no physical product outcome in routine driving work. Why Other Options Are Wrong: They share the “making things” attribute central to craftsmanship. Common Pitfalls: Do not judge by income or demand; the criterion is the nature of work. Final Answer: Driver

Question 9

Find the odd animal (bird vs mammal): Pick the one that is not a bird.

Accepted Answer

Introduction / Context: Taxonomic classification offers a crisp dividing line. Three options are birds (class Aves) with feathers and beaks. A bat is a mammal (class Mammalia) with fur and mammary glands. Given Data / Assumptions: Parrot, Crow, Pigeon: birds. Bat: mammal that can fly (powered flight). Concept / Approach: Use class-level taxonomy. Despite superficial similarity (wings, flight), bats are not birds; they are mammals with distinct anatomy and reproduction (live young, nursing). Step-by-Step Solution: 1) Tag parrot/crow/pigeon as birds (Aves).2) Tag bat as mammal (Mammalia).3) Bat is the only mammal → odd one out. Verification / Alternative check: Feathers vs fur: birds have feathers; mammals have hair/fur. Bats lack feathers. Why Other Options Are Wrong: They share the core bird traits. Common Pitfalls: Do not classify by ability to fly alone; some birds cannot fly and some mammals can (bats). Final Answer: Bat

Question 10

Find the odd relation (family vs non-family): Select the one that is not an immediate family relation.

Accepted Answer

Introduction / Context: Kinship terms distinguish biological/legally defined family from social relations. Three options are immediate family members; “friend” is a social relation outside the family tree. Given Data / Assumptions: Father/Mother/Brother: immediate family terms. Friend: non-kin social relationship. Concept / Approach: Classify by kinship. Immediate family membership yields inheritance and guardianship implications that friendships do not have. Step-by-Step Solution: 1) Group Father/Mother/Brother as kin.2) Identify Friend as non-kin.3) Friend is the odd one out. Verification / Alternative check: Check family tree diagrams: friend is external to the tree. Why Other Options Are Wrong: They are core family relations and thus coherent. Common Pitfalls: Emotional closeness does not convert a friend into kin in classification tasks. Final Answer: Friend

Question 11

Find the odd color (primary hue vs neutral): Choose the one that is not among the primary hues in the traditional RBY set.

Accepted Answer

Introduction / Context: Color classification here follows the traditional art primaries: red, blue, and yellow are treated as primary hues. Black is a neutral (achromatic) color, not a hue on the color wheel, which cleanly separates it from the others. Given Data / Assumptions: Red/Blue/Yellow: primary hues in many art/paint contexts. Black: neutral/achromatic; absence of light in additive sense, or a pigment mixture in subtractive use. Concept / Approach: Use color-wheel status (hue vs neutral). Primary hues serve as base for mixing many other colors; black does not act as a hue and sits off the wheel. Step-by-Step Solution: 1) Tag red/blue/yellow as primary hues.2) Tag black as neutral.3) Therefore, Black is the odd one out. Verification / Alternative check: On a standard color wheel, you will find red/blue/yellow positions but no position for black as a hue. Why Other Options Are Wrong: They share primary-hue status used for mixing palettes. Common Pitfalls: Do not mix additive (RGB) and subtractive (RYB/CMY) models; whichever model, black is not a hue. Final Answer: Black

Question 12

Find the odd city (country): Identify the city that is not in India.

Accepted Answer

Introduction / Context: Geographic classification by country borders offers a crisp filter. Three listed cities are in India; one is in a neighboring country, making it the clear outlier. Given Data / Assumptions: Kanpur: India (Uttar Pradesh). Lucknow: India (capital of Uttar Pradesh). Patna: India (capital of Bihar). Lahore: Pakistan (Punjab province). Concept / Approach: Check national affiliation of each city. The mismatch in country immediately determines the odd item. Step-by-Step Solution: 1) Tag Kanpur/Lucknow/Patna as Indian cities.2) Tag Lahore as Pakistani city.3) Lahore is the only non-Indian city → odd one out. Verification / Alternative check: State-capital check: Lucknow and Patna are capitals; Kanpur is a major Indian city; Lahore does not belong to India. Why Other Options Are Wrong: They are Indian cities and thus coherent as a set. Common Pitfalls: Similarity in cultural or historical heritage does not change modern national borders. Final Answer: Lahore

Question 13

Find the odd deity name (gender distinction): Choose the one that is a goddess while the others are gods.

Accepted Answer

Introduction / Context: Mythological names can be grouped by deity type. One name commonly denotes a goddess, whereas the others denote gods, providing a straightforward categorical distinction. Given Data / Assumptions: Shiv (Shiva): god. Ganesh (Ganesha): god. Vishnu: god. Durga: goddess. Concept / Approach: Use gendered deity categorization as found in standard references and worship traditions. The contrast does not require doctrinal nuance—only the typical identification of the name. Step-by-Step Solution: 1) Tag Shiva/Ganesh/Vishnu as gods (male deities).2) Tag Durga as goddess (female deity).3) Durga is the only goddess → odd one out. Verification / Alternative check: Iconography and textual references consistently identify Durga as a goddess. Why Other Options Are Wrong: They all refer to major male deities. Common Pitfalls: Spelling variants (Shiv/Shiva, Ganesh/Ganesha) do not affect category. Final Answer: Durga

Question 14

Find the odd anatomical item (organ/part vs tissue type): Identify the one that is not an external organ/part designation.

Accepted Answer

Introduction / Context: Human anatomy terms can be split into named organs/body parts versus tissue types. Eye, ear, and hand denote specific organs/parts; “bone” denotes a tissue type and skeletal element category, not a single external organ label. Given Data / Assumptions: Eye: sensory organ. Ear: sensory organ. Hand: articulated body part (multiple bones, muscles, tendons). Bone: tissue category/structural element, present throughout the skeleton, not an external organ name by itself. Concept / Approach: Use naming specificity: three items are discrete parts commonly referred to as organs/body parts. “Bone” is a material/tissue found in many parts, not a single part name. Step-by-Step Solution: 1) Group eye/ear/hand as part/organs.2) Classify bone as tissue/structural element.3) Bone is the odd one out. Verification / Alternative check: Ask: “Which part hurts?” → eye/ear/hand are parts; “bone” needs specification (e.g., femur, radius). Why Other Options Are Wrong: They point to distinct external organs/parts. Common Pitfalls: Hand contains bones, but the label “bone” is not a specific part name. Final Answer: Bone

Question 15

Find the odd material (gemstones vs rock): Select the item that is not a gemstone but a metamorphic rock.

Accepted Answer

Introduction / Context: Minerals and rocks are distinct categories. Diamond, ruby, and sapphire are gemstones (mineral species or varieties). Marble is a metamorphic rock composed chiefly of recrystallized carbonate minerals, which places it in a different geological class. Given Data / Assumptions: Diamond: gemstone (carbon crystal). Ruby: gemstone (corundum variety with chromium). Sapphire: gemstone (corundum variety with other trace elements). Marble: metamorphic rock, not a single mineral species. Concept / Approach: Classify by geology: single-mineral gemstones vs polymineralic (or rock-class) material. Marble’s composition and formation (metamorphism of limestone/dolostone) make it unlike the gemstones. Step-by-Step Solution: 1) Tag diamond/ruby/sapphire as gemstones.2) Tag marble as rock.3) Marble is the sole rock → odd one out. Verification / Alternative check: Usage contexts: gemstones are cut for jewelry; marble is quarried for architecture/sculpture. Why Other Options Are Wrong: They belong to the gemstone class with distinct optical hardness and clarity properties. Common Pitfalls: Do not conflate “ornamental stone” with “gemstone”; gemology vs petrology categories differ. Final Answer: Marble

Question 16

Find the odd fruit (citrus vs non-citrus): Choose the option that belongs to a different botanical/culinary group based on primary fruit family characteristics.

Accepted Answer

Introduction / Context: Odd one out questions often hinge on a single stable attribute that cleanly separates one choice from the rest. In fruit classification, a reliable separator is the botanical family and fruit type, particularly the citrus group known for segmented hesperidium fruits with characteristic acidic juice vesicles. Given Data / Assumptions: Orange: a citrus fruit, typically classified as a hesperidium, rich in acidic juice vesicles. Litchi: a non-citrus drupe with an aril; family Sapindaceae. Apple: a non-citrus pome; family Rosaceae. Guava: a non-citrus berry type; family Myrtaceae. Concept / Approach: Classify by major botanical grouping and fruit morphology. Citrus fruits share rind, pith, and segmented pulp; non-citrus fruits listed belong to different families and morphologies that do not match citrus traits. Step-by-Step Solution: 1) Tag Orange as citrus; others as non-citrus.2) Note morphological differences: hesperidium vs pome, drupe with aril, or berry.3) The only citrus representative is Orange; hence it is the odd item. Verification / Alternative check: Check typical culinary profiles: oranges are sour to sweet-tart with segment membranes and a peel with oil glands, unlike the textures and structures of litchi, apple, and guava. Why Other Options Are Wrong: Litchi, Apple, and Guava are all non-citrus and do not share the signature rind-pith-segment structure of citrus fruits. Common Pitfalls: Do not rely solely on sweetness or color; the decisive factor is the citrus morphology and family. Final Answer: Orange

Question 17

Find the odd zoological term (gendered noun vs species term): Pick the option that is not a specifically gendered animal term.

Accepted Answer

Introduction / Context: Verbal classification frequently uses parts of speech or semantic subtypes. In zoology, some common nouns explicitly encode gender, while others are generic species or kind terms. Identifying which words are gendered creates a clean separation for odd-one-out selection. Given Data / Assumptions: Bitch: female dog; explicitly gendered female term. Cow: female of cattle; explicitly gendered female term. Vixen: female fox; explicitly gendered female term. Horse: general species/common name without built-in gender marking. Concept / Approach: Group options by whether the noun denotes a gendered form. Three choices encode the female sex of a specific species, whereas one is the species term itself without gender information. Step-by-Step Solution: 1) Mark gendered terms: Bitch, Cow, Vixen.2) Identify the generic species term: Horse.3) Therefore Horse is the odd one out because it lacks explicit gender marking. Verification / Alternative check: Consider male counterparts: dog vs bitch, bull vs cow, dog-fox vs vixen. Horse requires stallion or mare to indicate gender, confirming its generic status. Why Other Options Are Wrong: They each specify a female animal and thus share the same semantic subtype. Common Pitfalls: Avoid mixing taxonomy with husbandry uses; the test relies on lexical gender marking within the noun. Final Answer: Horse

Question 18

Find the odd everyday object (torus with hole vs solid disc): Select the option that is not a ring-like, hollow circular object.

Accepted Answer

Introduction / Context: Shape-based classification is a robust method in reasoning questions. Here, three options are circular with a central hole facilitating wearing, mounting, or rotation, while one is a solid disc without a through-hole. The presence or absence of a hole is an objective geometric discriminator. Given Data / Assumptions: Ring: circular band with a central hole. Tyre: torus-like circular object with a central hole for the wheel rim. Bangle: circular band worn around the wrist, with a central opening. Plate: generally a flat, solid disc without a central hole. Concept / Approach: Group by topology: torus-like objects with a central aperture versus a solid disc. The functional design of ring, tyre, and bangle depends on the hole; a plate does not share that property. Step-by-Step Solution: 1) Identify items with central holes: Ring, Tyre, Bangle.2) Identify the item without a hole: Plate.3) Plate is the odd one out. Verification / Alternative check: Consider usage: the hole enables wearing or mounting; plates serve as surfaces, not mounts. Why Other Options Are Wrong: They all belong to the hollow circular class with an essential central opening. Common Pitfalls: Do not be misled by materials or size; the decisive feature is the presence of a through-hole. Final Answer: Plate

Question 19

Find the odd human body reference (complete organ or appendage vs sub-part): Choose the item that is a sub-structure rather than a full organ or appendage.

Accepted Answer

Introduction / Context: Human anatomy terms can be grouped by granularity. Whole organs or appendages contrast with their component sub-parts. Identifying which option denotes a component rather than a complete structure offers a clear odd-one-out criterion. Given Data / Assumptions: Hands: complete appendages including palm, fingers, and associated bones and muscles. Ears: complete sensory organs for hearing and balance. Eyes: complete sensory organs for vision. Fingers: sub-parts of the hand, not independent organs or appendages. Concept / Approach: Group items by whether they denote a whole organ or appendage. Fingers are constituent parts of hands, while hands, ears, and eyes are complete structures with distinct functions. Step-by-Step Solution: 1) Mark whole structures: Hands, Ears, Eyes.2) Mark sub-structure: Fingers.3) Therefore, Fingers is the odd item. Verification / Alternative check: Consider medical specialization: hands, ears, and eyes commonly map to full-structure examinations; fingers are examined as components of the hand. Why Other Options Are Wrong: They represent complete organs or appendages with independent primary functions. Common Pitfalls: Pluralization is not the criterion; the structural level is. Final Answer: Fingers

Question 20

Find the odd animal (dietary habit): Select the carnivore among predominantly herbivorous animals.

Accepted Answer

Introduction / Context: Classifying animals by primary diet provides a direct and unambiguous separator. Herbivores rely primarily on plant matter, while carnivores primarily consume other animals. A single carnivore among three herbivores yields a clear odd one out. Given Data / Assumptions: Giraffe: herbivore feeding on foliage. Zebra: herbivore grazing on grasses. Horse: herbivore consuming grasses and forage. Lion: carnivore, apex predator hunting ungulates. Concept / Approach: Group by trophic level and diet. Three options are obligate or predominant herbivores; one is a carnivore. This ecological role distinction is standard in biology and supports an objective answer. Step-by-Step Solution: 1) Mark herbivores: Giraffe, Zebra, Horse.2) Mark carnivore: Lion.3) The carnivore is the odd item. Verification / Alternative check: Check dental and digestive adaptations: lions have carnassials and a carnivore gut; the others have herbivore dentition and digestive strategies. Why Other Options Are Wrong: They share plant-based diets and similar ecological niches as prey or grazers. Common Pitfalls: Size or habitat is not the deciding factor; diet is. Final Answer: Lion

Classification Questions