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November 27, 2012

Classification / Odd Man Out Series Problems with Explnations - Alphabets


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Friends, Classification / Odd Man out Series is one of the important topic in Reasoning Section. In these type of questions they just give you 5 options and you should find the odd man out from the given set. I mean, if you are given 5 options like Parrot, Crow, vulture, Sparrow and Penguin and ask you to find the Odd man out, then your answer should be Penguin (because all the remaining birds can fly)... Ofcourse, some of you may say "Why not Vulture is the answer? Because its the only bird which eats dead bodies (actually one of my friends asked this question while writing this article). Point.... "May be other birds too will eat dead insects if they starved" I answered.  "Then penguins too can fly for short distances" she replied. Point Again!!! So what will be the correct answer? After all you are not going to argue with the examiner who evaluates your answer sheet (or Optical Marks Reader ofcourse). So, here you should keep in mind that OVER THINKING should be avoided while answering these type of questions. Think twice before marking your answer. Now lets go to the details. To made the concepts clear, we've divided this topic into 3 sections. 
Those are 
  1. Alphabets 
  2. Numbers 
  3. Words.  
Today, we shall discuss about Alphabets... Before reading this post, it is advisable to read about the place values of Alphabets here.

Single Alphabets : 
If single alphabets are given, then you should follow the order of checking 
  1. Vowels first. If you are unable to figure odd ones, then check for 
  2. mirror images, later 
  3. water images and finally check for the 
  4. place values so that you may get any clues with the number assiciated with that specific alphabet.
Example Problems :
  1. A   
  2. B  
  3. D  
  4. G
Solution :  Obviously here the answer is A. Because its the only Vowel in the list.
  1. A
  2. C
  3. E
  4. H
  5. J
Solution :  Here the answer is H. Because, the Difference between alphabets is 2. 

  1. D
  2. E
  3. F
  4. G
  5. H
Solution :  Here the Odd one is H, because it is the only Mirror Image in the List. (There are 2 water images D and H)

Alphabet Groups
If multiple Alphabets are given, you should follow the order of checking,

  1. Alphabetical order of given alphabets
  2. Distance / Gap between the given alphabets
  3. Vowel / Consonant differences
Example Problems : 
  1. ABC
  2. BCD
  3. CDE
  4. DEF
  5. EFG
Solution :  : 
Check the Order : ABC... BCD... CDE... DEF... EFG... Well, here all alphabets are in an order.. So we cant find out the Odd one with this logic. 
Check the Gap : All alphabets carrying equal number differences / Gaps.. So this technique too of no use.
Check for the Vowels. 
  • In the group 1, One vowel is there (A)
  • In the group 2, No vowel
  • In the group 3, One vowel is there (E)
  • In the group 4, One vowel is there (E)
  • In the group 5, One vowel is there (E)
So, answer should be the Group with NO VOWELS.. Group 2

  1. AE
  2. GM
  3. MQ
  4. VZ
  5. LP
Here you should note that AE are the only vowels in the given group. So maximum number of people choose Option 1 as their answers. BUT, according to our order given above, we should first check for the alphabetical order... no clue..... later GAP. Check the difference fro Ato E and G to M ....


Here, except the second pair all the remaining pairs are having 3 letters in between the given alphabets. But the second pair consists of 5 alphabets between G and M. So this is the Odd one. So the answer is Option 2 (not Option 1).

  1. DF
  2. TV
  3. VX
  4. NP
  5. HJ
Solution : 

  1. DeF
  2. TuV
  3. VwX
  4. NoP
  5. HiJ

Here all the given pairs are having ONE LETTER between them. So now we shall check those alphabets for clue. e, u, w, o, i.. .Here except w all the remaining alphabets are vowels. So, obviously the odd one is the 3rd pair. 

  1. AFH
  2. AHL
  3. AJM
  4. ARW
  5. ANR
Well this is little complected one... have a close look... We can't find anything with Alphabetical order.. So try GAPs...

A _ _ _ _ F _ H  
A _ _ _ _ _ _ H _ _ _ L
A _ _ _ _ _ _ _ _ J _ _ M
A _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ R _ _ _ _ W
A _ _ _ _ _ _ _ _ _ _ _ _ N _ _ _ R

6 3 L
8 2 M
16 4 W
123 R                No Clue :(

Try adding the numbers we got in gaps.....

4+1 = 5
6+3 = 9
8+2 = 10
16+4 = 20
12+3 = 15       No Clue :(

Subtract the numbers,

4-1 = 3
6-3 = 3
8-2 = 6
16-4 = 12
12-3 = 9       No Clue :(

Multiply the numbers

4*1 = 4
6*3 = 18
8*2 = 16
16*4 = 64
12*3 = 36     ................

hey see, are you able to figure out anything?

All numbers except 18 are square numbers. So option 2 is the Odd one.

And remember, for the purpose of explanation, we gave detailed step by step procedure here. For in your exam hall, you should figure out the option / procedure in a single glance. With good practice only you can achieve that state. 

  1. ACF
  2. ADI
  3. AGG
  4. AFW
  5. AEO
Solution : 

A 1 C 2 F
A 2 D 4 I
A 5 G 25 G      (Note : After Z you should again start with A and continue your counting)
A 4 F 16 W
A 3 E 9 O

With a glance, we can find out that 
  • 2's square is 4
  • 5's square is 25
  • 4's square is 16
  • and 3 's square is 9
So, here the odd one is the Option 1.

  1. VT
  2. MQ
  3. PR
  4. DF
  5. FG
Solution : Here except Option 1 (VT) all remaining alphabets are in alphabetical order. VT is in reverse order. So this is the ODD one.

  1. LO
  2. RU
  3. BE
  4. FI
  5. AD
Solution : Here, except the 5th option, all the remaining groups having VOWELs (O, U, E, I) in the second position. But the 5th group contains VOWEL (A) in the first position. So, it is the Odd one.
  1. LP
  2. SW
  3. QU
  4. MR
  5. AE
Solution : Here, except the 4th group, all the remaining groups contains only 3 alphabets between them. But the 4th group has 4 alphabets between M and R. 
  1. BF
  2. NR
  3. WS
  4. TX
  5. LP
Solution : 3rd groups is reverse in Alphabetical order. So, it is the odd one.

  1. NQV
  2. HKP
  3. RWZ
  4. JMR
  5. KNS
Solution : 

N Q 4 V
H 2 K 4 P
R 4 W 2 Z
J 2 M 4 R
K 2 N 4 S

Here obviously the Odd one is option 3.

Thats all for now friends. In our next class we shall discuss about the Classification / Odd Man Out series problems of Numbers and Words. Happy Reading :) And don't forget to tell your friends about us if you feel this blog is worth reading. Good Day.

Odd Man Out and Series Questions and Answers with Explanations


  1. Thank u very much Mam. When will U post mock test.

  2. Mam i m confused in because there r 5 alphabets between Q and W. and 4 alphabets between M and R.

    1. Sorry for the inconvenience Ankit. Thats a typing mistake actually. The pair is "QU" not "QW". Corrected it now. Thank you so much for the complaint

      Good Day

  3. check the last question,its answer is option 3.but you have given as option 4.

    1. Yep you are correct Devi. Its a typing mistake.... Corrected it now. Sorry for the inconvenience. Good Day

  4. u r doing splendid job
    keep it up .....

  5. Excellent explanation..good work

  6. good tips thanks keep posting more....

  7. Its really nice way to explain

  8. really very excellent blog.past 3 days i was searching these type of information. really you guys rock......

  9. can u post problems on numbers and words

  10. thank you so much it is very help full..... great job...

  11. Thank you very much very useful questions with crystal clear explanation

  12. superb dude keep it up

  13. fantastic man...awesome site...i liked it....

  14. can u provide any mock test for ibps clerk

  15. Plz post problems on numbers and words

  16. Thanks for giving this

  17. in the section of single alphabets 3rd example why not the answer be 2nd option i.e. "E"(because it is the only vowel in the given series) can you please explain?

  18. great work... in the third question.. when we add the gaps we get the answers as 5,9,10,20,15.. my doubt is why cant the answer be opted at this stage since all other options except second one ie., 9 are multiples of 5..

  19. greetings,
    first of all thank you very much for such a wonderful job..
    in the 4th question of the example problems, when we add the gaps we get the answers as 5,9,10,20,15. my doubt is, since all the other options except the second one ie., 9 , are the multiples of 5. is it necessary to carry out other steps?.. or am i over thinking?? plz help..
    keep up the good work..

  20. U r doin an excillent job...thnx fo d information given can u plz upload the methods to find out odd one among numbers....plz upload ASAP :)

  21. I am reading each and every line in this website . because whatever you have posted is really important for me .

  22. @wonderful site..mam I have 1 doubt here in odd man out qs D E F G H 1st rule is to check vowel then the water image and mirror image.So how it can be H.Why it is not E(as it is vowel)?please mam help me..
    My 2nd doubt.Can all syllogism problem be solved by venn diagram(though I preferred to dowith rules)?Please give me a clear picture when venn diagram process is used and when syllogism .

  23. @wonderful site..mam I have 1 doubt here in odd man out qs D E F G H 1st rule is to check vowel then the water image and mirror image.So how it can be H.Why it is not E(as it is vowel)?please mam help me..
    My 2nd doubt is that when we use syllogism and when we use venn diagram approach ..

  24. Hi,
    What about the odd man out series for numbers and words ???? pls reply...
    And thank u so much for all the details u are providing.........

  25. us H wale doubt k alawa, is post pe ek ''super like'' to bnta he.. bht mja aya ise pd k..

  26. Single Alphabet eg:3 ...The ans must be 'E' because its only vowel in options???please check

  27. YES for eg.3 the ans is E. because first we hav to check vowels and then water and mirror images.

  28. excellent work done maam

  29. hi madam wn u ll upload odd man series of no and words


  31. @Shiv RK
    In example AFH, AHL,AJM,ARW,AMR.... By adding the gaps, the result we got was
    AFH(5),AHL(9),AJM(10),ARW(20),AMR(15). Clue would have been number 9 as it is not a multiple of 5 while remaining are. So, the answer is B which is also correct explained by also.
    Thanks a lot for giving such tricks.

  32. After a long search, I found such a useful site.Great work done.Things are explained in a very simple and interesting way.Very happy to study these,enjoyed learning new tricks.Thank you So much.Keep it up :)

  33. excellent work maam but at Question 5 we get ans in first step only no need to subtract and multiply.. because in the first one all are multiples of 5 except 9

  34. In third example of Alphabet group

    Try adding the numbers we got in gaps.....
    4+1 = 5
    6+3 = 9
    8+2 = 10
    16+4 = 20
    12+3 = 15 No Clue :(

    Here, 9 is the clue bcz it is not divisible by 5, but others are.

    correct this

  35. Great Job Mam....mam i am unable to find blog of odd man out of numbers and words...plz help

  36. mam. In single alphabets, example no. 3, I think the answer is E mam. because, according to the order of checking, first we check the VOWELS before mirror images. In that example vowel E is there. So, I think the answer is E. Is it correct mam?

  37. in 2nd example ,, A , C, E, H, J
    YOU SAID ANSWER IS H because difference between place is 2 ,, so is j is in it correct position ???
    PLEASE check it

  38. Great job thankyou

  39. Thank you soo much for such a nice n elaborated explanation. Plz provide more stuff lyk this and some practice sets too.

  40. Mam I need numbers and words classification also...

  41. mam i want numbers and words classification also


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