Classification Reasoning

CLASSIFICATION REASONING (All Common Questions)

There are different types of CLASSIFICATON:

(1) Letter/meaningless word based claffication
(2) Meaningful word based classification
(3) Digit based classification
(4) General knowledge based classification.

Frequently Asked Past Questions & Answers




Find the odd word/letters/number pair from the given alternatives. (A) Rice (B) Wheat (C) Barley (D) Mustard The right option is A Explaination → All are rabi crops, while rice is a kharif crop.

Find the odd word/letters/number pair from the given alternatives. (A) Arrow (B) Sword (C) Knife (D) Axe The right option is A Explaination → All except Arrow are used while holding hand.

Find the odd word/letters/number pair from the given alternatives. (A) Listen (B) Feel (C) Think (D) Sing The right option is D Explaination → Sing is the only one that needs sound/vocal.

Find the odd word/letters/number pair from the given alternatives. (A) Volume (B) Size (C) Large (D) Shape The right option is C Explaination → Here, large is an adjective and others are noun. All others except large are related to physical matter while large could also meant for abstract matter.

Find the odd word/letters/number pair from the given alternatives. (A) Anxiety (B) Worry (C) Inhibition (D) Curiosity The right option is D Explaination → Except for the word 'Curiosity' (which means the tendency to ask and learn about things by asking questions), all other given words are synonyms of each other. Except the word Curiocity, all others are negative. So, Curiosity is odd among all.

Find the odd word/letters/number pair from the given alternatives. (A) Seismograph (B) Earthquake (C) Cyclone (D) Tsunami The right option is A Explaination → Except (A) all are natural disasters. While Seismograph is an instrument used to measure the intensity of earthquakes.

Find the odd word/letters/number pair from the given alternatives. (A) Nephrology (B) Entomology (C) Astrology (D) Mycology The right option is C Explaination → All except Astrology are concerned with biology.

Find the odd word/letters/number pair from the given alternatives. (A) Mathematics (B) Geometry (C) Algebra (D) Trigonometry The right option is A Explaination → Here, all except Mathematics are branches of Mathematics.

Find the odd word/letters/number pair from the given alternatives. (A) Advice (B) Counsel (C) Direct (D) Suggest The right option is C Explaination → Here, All except Direct are synonyms

Find the odd word/letters/number pair from the given alternatives. (A) Petrol (B) Acetone (C) Mercury (D) Kerosene The right option is A Explaination → Mercury is the only metal in the group

Find the odd word/letters/number pair from the given alternatives. (A) Medium (B) Average (C) Mediocre (D) Terrible The right option is D Explaination → All except Terrible are synonyms.

Find the odd word/letters/number pair from the given alternatives. (A) Travelled (B) Sailed (C) Walked (D) Rode The right option is A Explaination → Except the word 'Travelled' all others are different modes of travel.

Find the odd word/letters/number pair from the given alternatives. (A) Telescope (B) Transistor (C) Taperecorder (D) Telephone The right option is A Explaination → All except Telescope are audio devices (or Electronic transmittor).

Find the odd word/letters/number pair from the given alternatives. (A) Lord Dalhousie (B) Lord Mountbatten (C) Lord Linlithgow (D) Lord Tennyson The right option is D Explaination → All except Lord Tennyson were viceroy or governor general of India

Find the odd word/letters/number pair from the given alternatives. (A) Microbe (B) Microflim (C) Microphone (D) Microscope The right option is A Explaination → In all other words except Microbe, 'micro' has been added as a prefix. In all other words except Microbe are non-living / man-made objects.

Find the odd word/letters/number pair from the given alternatives. (A) Foreward (B) Text (C) Index (D) Preface The right option is B Explaination → All others except TEXT are part of a book's front matter.

Find the odd word/letters/number pair from the given alternatives. (A) Analysis (B) Search (C) Conclusion (D) Investigation The right option is C Explaination → Conclusion is the last stage of analysis, search and investigation.

Find the odd word/letters/number pair from the given alternatives. (A) Room (B) Chamber (C) Veranda (D) Cabin The right option is C Explaination → Except Veranda, all others have door.

Find the odd word/letters/number pair from the given alternatives. (A) ISLOJ (B) LUOQM (C) AKDCB (D) FPILG The right option is C Explaination → Except [c], in each of other groups 1st + 10 = 2nd 2nd - 7 = 3rd 3rd + 3 = 4th 4th - 5 = 5th OR Except [c], in each of other groups 2nd, 3rd, 4th and 5th letter are obtained by adding 10, -7, +3 and -5 respectively to its previous letter.

Find the odd word/letters/number pair from the given alternatives. (A) HJN (B) JLP (C) PRU (D) QSW The right option is C Explaination → In all other groups, first two letters are alternate and third letter is 4 steps ahead of the second. Here, it follows a pattern of +2, +4. HJN = H → +2 = J, J → +4 = N JLP = J → +2 = L, L → +4 = P PRU = P → +2 = R, R → +3 = U QSW = Q → +2 = S, S → +4 = W Here, all the options except PRU follow this pattern.

Find the odd word/letters/number pair from the given alternatives. (A) PORM (B) WVYT (C) KJMH (D) FEJC The right option is D Explaination → In all other groups, first and third letters as well as fourth and second letters are alternate.

Find the odd word/letters/number pair from the given alternatives. (A) GJOV (B) BFJQ (C) ILQX (D) RUZG The right option is B Explaination → G → +3 = J → +5 = O → +7 = V B → +4 = F → +4 = J → +7 = Q I → +3 = L → +5 = Q → +7 = X R → +3 = U → +5 = Z → +7 = G

Find the odd word/letters/number pair from the given alternatives. (A) BFJM (B) DEFG (C) JMPS (D) PRTV The right option is A Explaination → Except [A], in all other groups, the number of letters skipped between adjacent letters is uniform.

Find the odd word/letters/number pair from the given alternatives. (A) CXGT (B) EVBY (C) DXEY (D) AZDW The right option is c Explaination → In all other groups, except [C], the 1st and 2nd letters are REVERSE / OPPOSITE as well as the 3rd and the 4th letters do.

Find the odd word/letters/number pair from the given alternatives. (A) AZMN (B) BYEF (C) CXUV (D) IRDV The right option is C Explaination → Except [D], all other groups follow the pattern that the 1st and 2nd letters are REVERSE / OPPOSITE and the 3rd and the 4th letters are consecutive (one after the other).

Find the odd word/letters/number pair from the given alternatives. (A) EBD (B) IFH (C) QMO (D) YVX The right option is C Explaination → Except [C], all other groups follow the pattern 2nd +2 = 3rd, and 3rd and 4th are consecutive In all other groups except [C], the last and first letters are consecutive.

Find the odd word/letters/number pair from the given alternatives. (A) BDGK (B) JLOS (C) HJMQ (D) MORU The right option is D Explaination → Except [D], all other groups follow the pattern 1st → +1 = 2nd, 2st → +2 = 3nd, 3st → +3 = 4nd,

Find the odd word/letters/number pair from the given alternatives. (A) BCYZ (B) EFVW (C) DEUZ (D) ABZA The right option is D Explaination → Except [C], all other groups follow the pattern that 1st and 2nd letters as well as 3rd and the 4th letters are consecutive.

Find the odd word/letters/number pair from the given alternatives. (A) PROQN (B) DECEG (C) GIFHE (D) KMJLI The right option is B Explaination → Except [B], all other groups follow the pattern that letters are consecutive counting from right to left alternate for twice i.e. PROQN is counting as N → O → P → Q → R

Find the odd word/letters/number pair from the given alternatives. (A) ACEGF (B) FHJLK (C) KMOQP (D) UWYZA The right option is D Explaination → Here, in each of the group, the second letter is two steps ahead of first letter, the third letter is two steps ahead of the second letter and the fourth letter is two steps ahead of the third letter and the fifth letter is one step back to the fourth letter, according to the English alphabet which is not the case with UWYZA. Except [D], all other words follow the pattern that 1st, 2nd, 3rd and 4th letters are two letters gap each while the 5th letter is the preceeding letter of the 4th.

Find the odd word/letters/number pair from the given alternatives. (A) CADGE (B) JHKNL (C) ECFGI (D) XVYBZ The right option is C Explaination → In each option except C, the alternate letters(1, 3, 5) are consecutive in normal alphabetic series and 2nd and 4th letters are differ by 6. But in option C, the 2nd and 4th letters differ by 4. Hence, option C is the odd one.

Find the odd word/letters/number pair from the given alternatives. (A) AI (B) IU (C) BO (D) OU The right option is C Explaination → Except [C] All other groups contain two consecutive vowels of the alphabet.

Find the odd word/letters/number pair from the given alternatives. (A) PUT (B) OWL (C) END (D) ARM The right option is A Explaination → Except [A] All other groups began with vowel.

Find the odd word/letters/number pair from the given alternatives. (A) 126 (B) 122 (C) 65 (D) 50 The right option is A Explaination → Except [A] All other groups follows X2 + 1

Find the odd word/letters/number pair from the given alternatives. (A) 226 (B) 290 (C) 360 (D) 170 The right option is C Explaination → Except [C] All other groups follows X2 + 1 while [C] follows X2 - 1

Find the odd word/letters/number pair from the given alternatives. (A) 20,10 (B) 30,18 (C) 45,27 (D) 60,30 The right option is A Explaination → Except [A] All other groups have common factor 3 (i.e. all except [3] are divisible/multiple by 3)

Find the odd word/letters/number pair from the given alternatives. (A) 7,26 (B) 8,30 (C) 10, 35 (D) 13,44 The right option is B Explaination → Except [B] All other groups follow 7 x 3 + 5 = 26 8 x 2 + 4 = 30 10 x 3 + 5 = 35 13 x 3 + 5 = 44

Find the odd word/letters/number pair from the given alternatives. (A) 1/2, 1/8 (B) 1/3, 1/12 (C) 9, 3 (D) 24, 6 The right option is C Explaination → Except [C] All other groups follow the pattern 2nd term x 4 = 1st term

Find the odd word/letters/number pair from the given alternatives. (A) 3, 5 (B) 7, 9 (C) 11, 13 (D) 17, 19 The right option is B Explaination → Except [B] All other groups follow the pattern Consecutive Prime Numbers

Find the odd word/letters/number pair from the given alternatives. (A) 7:18 (B) 9:26 (C) 11:36 (D) 13:42 The right option is C Explaination → Except [C] All other groups follow the pattern 1st term x 4 - 10

Find the odd word/letters/number pair from the given alternatives. (A) 80-9 (B) 64-8 (C) 36-6 (D) 7-49 The right option is A Explaination → Except [A] All other groups follow the pattern (Smaller digit)2 = Bigger number

Find the odd word/letters/number pair from the given alternatives. (A) 72, 60 (B) 108, 96 (C) 84, 72 (D) 60, 36 The right option is D Explaination → Except [D] All other groups follow the pattern (2nd term) + 12 = 1st term

Find the odd word/letters/number pair from the given alternatives. (A) 12, 8 (B) 6, 16 (C) 18, 6 (D) 32, 3 The right option is C Explaination → Except [C] All other groups follow the pattern that one of the term is not the divisor of the other Here 18 is divisible by 6 while others didn't follow this pattern.

Find the odd word/letters/number pair from the given alternatives. (A) 74-40 (B) 62-37 (C) 85-60 (D) 103-78 The right option is A Explaination → Except [A] All other groups follow the pattern 74 - 40 = 34 62 - 37 = 25 85 - 60 = 25 103 - 78 = 25

Find the odd word/letters/number pair from the given alternatives. (A) 81:243 (B) 16:64 (C) 64:192 (D) 25:75 The right option is A Explaination → Except [A] All other groups follow the pattern 81 x 3 = 243 16 x 3 = 48 (64) 64 x 3 = 192 25 x 3 = 75

Find the odd word/letters/number pair from the given alternatives. (A) 52, 142 (B) 54, 126 (C) 56, 168 (D) 58, 184 The right option is C Explaination → Except [C] All other groups follow the pattern of digit sum 5 + 2 = 1 + 4 + 2 5 + 4 = 1 + 2 + 6 5 + 6 ≠ 1 + 6 + 8 5 + 8 = 1 + 8 + 4

Find the odd word/letters/number pair from the given alternatives. (A) 14, 9 (B) 17, 8 (C) 42, 3 (D) 21, 6 The right option is B Explaination → Here 14 x 9 = 126 17 x 8 = 136 42 x 3 = 126 21 x 6 = 126

Find the odd word/letters/number pair from the given alternatives. (A) 117, 13 (B) 162, 18 (C) 171, 19 (D) 304, 16 The right option is D Explaination → Here 13 x 9 = 117 18 x 9 = 162 19 x 9 = 171 16 x 9 = 144

Find the odd word/letters/number pair from the given alternatives. (A) Fervent (B) Enthusiastic (C) Apathetic (D) Ardent The right option is C Explaination → Except Apathetic all others are synonyms i.e. Characterized by strong enthusiasm (intense emotion) while Apathetic is Showing little or no emotion or animation

Find the odd word/letters/number pair from the given alternatives. (A) FAA (B) OFF (C) ATT (D) EPP The right option is A Explaination → In all other groups except [A], a vowel is followed by a consonant repeated twice. (OR except [A] all others are started with vowel)

Find the odd word/letters/number pair from the given alternatives. (A) 117-143 (B) 142-156 (C) 64-78 (D) 103-169 The right option is A Explaination → All except [A] are divisible by PRIME 13

Find the odd word/letters/number pair from the given alternatives. (A) Radio (B) Television (C) Transistor (D) Tube The right option is D Explaination → All except [D] are electrical appliances

Find the odd word/letters/number pair from the given alternatives. (A) Pathology (B) Geology (C) Cardiology (D) Radiology The right option is B Explaination → All except [B] are related to medical science

Find the odd word/letters/number pair from the given alternatives. (A) Rivulet (B) Stream (C) River (D) Pond The right option is D Explaination → All except [D] are in-out flow while Pond is a stagnant water

Find the odd word/letters/number pair from the given alternatives. (A) Konark (B) Madurai (C) Dilwara (D) Ellora The right option is D Explaination → All except [D] are famous for TEMPLES while Ellora is famous for CAVES

Find the odd word/letters/number pair from the given alternatives. (A) RTW (B) QOM (C) IKG (D) IKM The right option is A Explaination → All except [A] contain alternate letters of alphabet. i.e. RTW = R +2 → T +3 → W QOM = M +2 → O +2 → Q IKG = G +2 → I +2 → K IKM = I +2 → K +2 → M

Find the odd word/letters/number pair from the given alternatives. (A) EFH (B) OPQ (C) BCE (D) IJL The right option is B Explaination → All except [A] contain alternate letters of alphabet. i.e. EFH = E +1 → F +2 → H OPQ = O +1 → P +1 → Q BCE = B +1 → C +2 → E IJL = I +1 → J +2 → L

Find the odd word/letters/number pair from the given alternatives. (A) DH (B) FJ (C) HK (D) PR The right option is C Explaination → All except [A] contain alternate letters of alphabet. i.e. DH = 4 + 8 = 12 FJ = 6 + 10 = 16 HK = 8 + 11 = 19 PR = 16 + 18 = 34

Find the odd word/letters/number pair from the given alternatives. (A) 24 (B) 49 (C) 80 (D) 15 The right option is B Explaination → Only [B] are perfect square.

Find the odd word/letters/number pair from the given alternatives. (A) 121 (B) 324 (C) 523 (D) 729 The right option is C Explaination → All except [C] are perfect squared numbers.

Find the odd word/letters/number pair from the given alternatives. (A) 704, 11 (B) 256, 4 (C) 832, 13 (D) 310, 5 The right option is D Explaination → Here, 704 = 11 x 64 256 = 4 x 64 832 = 13 x 64 310 ≠ 5 x 64

Find the odd word/letters/number pair from the given alternatives. (A) Tennis (B) Cricket (C) Volleyball (D) Football The right option is D Explaination → Football is the odd one out because all the other games are played by hand, but Football is played by leg.

Find the odd word/letters/number pair from the given alternatives. (A) Artificial (B) Insincere (C) Affected (D) Naive The right option is D Explaination → Naive means simple or innocent while all others are of haveing negative traits Naive (Adjective) means : showing lack of experience, wisdom or judgement, natural and innocent in speech and behaviour. All the other three words show the sense of feigning.

Find the odd word/letters/number pair from the given alternatives. (A) 68 (B) 85 (C) 153 (D) 174 The right option is D Explaination → Except [D] all others are divisible by Prime 17

Find the odd word/letters/number pair from the given alternatives. (A) 7:98 (B) 9:162 (C) 12:288 (D) 17:572 The right option is D Explaination → Except [D] in all others groups the 2nd term is divisible by 1st term i.e. 98 ÷ 7 = 14 162 ÷ 9 = 18 288 ÷ 12 = 24 572 ÷ 17 = decimal point comes