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ALPHABET SERIES
Alphabet Series : The types of alphabet series questions are similar to
number series questions. Here, we will be given sequence
Alphabet series just like number series. But, here we will of alphabet one or more at a time to understand the logic
be given certain alphabet in sequence or combination of and answer the question. Study the solved examples given
one or more alphabets in the sequence based on certain below to understand the concept of number series well.
pattern or logic or mathematic operation considering
alphabets are numbered in some or the other ways. Alpha-Numeric Series
This concept is the combination of Number series and
The first thing we can do for this chapter is that we must
Alphabet series. In this chapter we will be given a particular
remember the number of each and every alphabet of English
sequence of numbers and alphabets combined. The questions
Language. eg., A is 1, B is 2, C is 3 and so on. The other
will be based on certain pattern of number or alphabets or
thing is that the logic can be reversed also, that means, A is
based on the combination of both. In other words, we can
26, B is 25, C is 24, …. Z is 1. Other things are almost
say that there might be possible that the logic behind letters
same as number series.
will be different from logic behind numbers or the logic might
Note: To remember the numbers of alphabets students can be combined with them.
use the trick given below.
Illustration: A1, D2, G3, J4, M5, ?
Try to remember the word EJOTY. In that E is 5, J is 10,
Here, the logic for alphabets is that we have taken first
O is 15, T is 20, Y is 25. Based on this, you can remember
alphabet then left next 2 alphabets, taken D, left two
the nearby alphabets to any of these alphabets.
alphabets, taken G, left two alphabets taken J and so, on.
E J O T Y
And the logic for numbers is different, which is natural
5 10 15 20 25 numbers are taken in sequence starting from 1. So, final
answer will be P6.
Note: To remember the opposite letter or corresponding Illustration: A2C, F7H, K12M, P17R, U22W, ?
letter based on the distance from ends, like A is opposite of
Z as A is first from beginning and Z is first from ending. Here, in this example, the logic of the question is that first
When half of the alphabets are written in a row and the three alphabets are considered but from that middle is
remaining half are written below it in reverse order as shown represented by number 2 as B is second letter. Then 4th and
in the table given below, we have opposite of the alphabets. 5th letter are skipped. And then 6th, 7th and 8th letters are
Z is opposite of A and vice versa. B is opposite of Y and taken but in that, the middle is represented by number 7 as
vice versa. M is opposite of N and vice versa, as given in G is 7th letter in alphabet. Then again two letters are skipped
the table below. The distance from the start or the end is and then three are taken and in that middle is represented
same for these pairs of letters. by number and so on. So, final answer is Z1B.

1 2 3 4 5 6 7 8 9 10 11 12 13 Please see, the figure given below to understand the pattern.

A B C D E F G H I J K L M Such patterns are developed for questions to be made to
solve. So, students must understand such patterns to develop
Z Y X W V U T S R Q P O N the fundamental logic behind different questions.
26 25 24 23 22 21 20 19 18 17 16 15 14

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So, the final answer is NUB. Option C is the answer.
Ex. 4: Z, V, R, N, ?, F, B
a) K b) L
c) M d) J
Sol. 4: Here, the series starts in the reverse order of
So, the concept remains same as that in number series or alphabets. Z is written first and then 3 letters are skipped. V
alphabet series. We have to just identify the pattern and is written as next letter and then 3 letters are skipped. R is
based on that we can answer the question accordingly. Study written and again 3 letters are skipped and so on. So, the
the solved examples given below to understand the con- missing letter is J in place of question mark. Option D is the
cept well. answer.
Alphabet Series (Solved Example): Ex. 5: A, CD, GHI, MNOP, UVWXY, ?
Directions (1 to 5): In each of the questions given a) EFGHJI b) EFGHIJ
below, find out the missing term or next term in the given c) EGFIHJ d) EFGIHJ
alphabet series. Sol. 5: Here, the series is written as one letter written and
Ex. 1: AC, EG, IK, MO, QS, ? one letter skipped. Next two letters written and next to letters
a) UV b) UW skipped. Then next three letters written and three letters
c) TU d) WU skipped and so on. So, the final answer is option B.
Sol. 1: Here, the alphabets are given in pairs. The pairs are Directions (6 to 9): In each of the questions given
made by skipping the letter between those two letters. Also below, find out the missing term or next term in the given
each pair is made after skipping one alphabet. For the pair alphabet series.
AC, letter B is skipped. Then to make the next pair first D Ex. 6: ZXV, TRP, NLJ, HFD, BZX, ?
is skipped and then to make that pair F is skipped. Then H a) VTQ b) WTS
is skipped to make the pair IK, and in that pair J is skipped c) VTR d) VTS
and so on. So, the final answer will be UW. Option b is the Sol. 6: Here, the series starts in the reverse order of
answer. alphabets after skipping alternate letters and three letters
Ex. 2: B, E, I, N, T, ? are written together. Z is written first and then Y is skipped.
a) A b) X X is written and W is skipped and then V is written and U is
c) Z d) B kipped and then second group of three letters is written in
Sol. 2: Here, the alphabets are skipped based on natural the same pattern. Every time three letter group is written
number series. That means, first 1 letter A is skipped and B after skipping alternate letters. So, option C is the answer.
is written. Then 2 letter skipped and E is written. Then 3 Ex. 7: ZYCD, XWEF, VUGH, ?, RQKL, POMN,
letters skipped and I is written. And so on. So, final answer a) TSIJ b) TSJI
is A after skipping 6 letter. Option A is the answer. c) STIJ d) VITS
Ex. 3: JAF, KEE, LID, MOC, ? Sol. 7: Here, the series is written with each group consisting
a) NOK b) NUC of four letters. In each group first 2 letters are written
c) NUB d) NIB reversed order of alphabet starting from Z. and the third
Sol. 3: Here, first letter in each group of three letters is and fourth letter in each group are written in sequence starting
sequential alphabet, staring from J. J, K, L, M, N and so with C. so, the final answer is option A.
on. Second letter in each group is a vowel in sequence. A, Ex. 8: BY, FU, MN, CX, JQ, OL, ?
E, I, O, U. And third letter is reversed sequence of letters a) TG b) TS
starting with F. F, E, D, C, B. c) SF d) VI

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Sol. 8: Here, in each pair of two letters, the opposite letters Ex. 3: S12Q, O23M, K34I, G45E, ?
are written together. So, only option A has opposite letters. a) C53A b) D54C
So, answer is option A. c) C54A d) A54C
Note: Opposite of A is Z. Opposite of Y is B. Opposite Sol. 3: Here, the alphabets are written in the reversed order
of X is C and so on. and also skipping one alphabet every time once first alphabet
Ex. 9: ZYA, UTE, POI, KJM, ? S is written. S is written and then R is skipped and Q is
a) EFQ b) FEQ written for the first term. Then P is skipped and O is written
c) SEF d) FES and then N is skipped and M is written and so on. In between
Sol. 9: Here, in each group of three letters, first two letters these two letters numbers are written in sequence as 23,
are written in reversed order of alphabets. The third letter is 34, 45, 54, and so on. So, the final answer is C54A. Option
in forward sequence. Each time three letters are skipped. C is the correct answer.
For reversed order and forward order. Ex. 4: A5BCD, EF6GH, IJK7L, MNOP8, Q9RST,
For the first two letters in each group: UV10WX, ?
ZY written, and three letters XWV skipped. UT written a) WXY11Z b) YZA11C
and SRQ skipped. PO written and NML skipped and so c) YXZ11A d) YZA11B
on. Sol. 4: Here, the alphabets are written in the forward order
For the third letter in each group: with a group of four alphabets together. And they are taken
A is taken and BCD skipped, E is taken and FGH skipped, from the first letter A. In each group four letters are taken
I is taken and JKL skipped and so on.
and a number is inserted among them at different place
So, the final answer is FEQ. Option B is the final answer.
starting from second place, then third place and so on. In
Alpha-Numeric Series(Solved Example)
each group there are 5 places. Once the number reached
Directions (1 to 5): In each of the questions given
the last place, the process starts same as in the first group.
below, find out the missing term or next term in the given
So, the answer is YZA11B. Option D is the answer.
alphanumeric series.
Ex. 5: EF1ZY, GH3XW, IJ5VU, KL7TS, ?
Ex. 1: A1B, C4D, E9F, G16H, ?, K36L
a) OP11RQ b) OP9RQ
a) H25J b) I25J
c) MN9RQ d) MN9QR
c) J25K d) I25K
Sol. 5: Here, the group of five characters is made in which
Sol. 1: Here, the alphabets are given in pairs starting with
first two letters are from the front side of alphabets and last
first alphabet. Between the two alphabets, the square of
two are from the back side of alphabets. The first term starts
natural numbers is inserted. So, the missing term will be
with EF followed by and followed by ZY. The second term
I25J. And the answer is option B.
is, GH followed by 3 and followed by XW and so on. The
Ex. 2: E4F, I6J, M8N, Q10R, ?
odd numbers are inserted between the group of two letters.
a) U10V b) U10W
So, the answer is MN9RQ. Option C is the correct answer.
c) U12V d) W12U
Directions (6 to 8): In each of the questions given
Sol. 2: Here, the alphabets are written in pairs. And in
below, find out the missing term or next term in the given
between two alphabets an even number is added. Each
alphanumeric series.
group is made after skipping 2 alphabets once the first group
Ex. 6: A1Z, E2X, I5V, M16T, Q65R, ? U326P
of three characters is made. E4F is made first, and then G
a) V326P b) O324Q
and H are skipped. Then I6J is written. Again 2 alphabets
c) V226P d) U326P
K and L are skipped and so on. So, the final answer is
Sol. 6: Here, the number series is x1+1, x2+1, x3+1, x4+1,
U10V. Option C is the answer.
and so on.

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For the first letter, the series is, +4, +4, +4, ……., A, E, I, PRACTICE EXAMPLE
M, ……. Alphabet Series
For the last letter, the series is, -2, -2, -2, -2, ……., Z, X, Directions : (1 to 7) Find the missing term :
V, T, …….. Ex-1. A, C, ?, G, I
So, the final answer is U326P. Option D is the correct (A) E (B) D
answer.
(C) F (D) H
Ex. 7: ABC004, GHI016, MNO036, STU064, YZA100,?
Ex-2. V, T, R, ?, N, ?
a) EGF142 b) GFE144
(A) O, M (B) P, M
c) EFG142 d) EFG144
Sol. 7: Here, the number series is the square of even (C) L, P (D) P, L
numbers written in three digits. Square of 2 is 004. Square Ex-3. A, C, F, ? , O
of 4 is 016. Square of 6 is 036 and so on. (A) G (B) J
For the letters, three letters are written and three letters are (C) H (D) K
skipped. Again next three letters are written and next three Ex-4. DC, DE, FE, ?, HG, HI
skipped and so on. So, the answer is EFG144. The correct (A) FE (B) FG
option is option D. (C) GF (D) GH
Ex. 8: PQ4RS, XY6ZA, FG10HI, NO16PQ, VW24XY, Ex-5. CIR, GMV, KQZ, OUD, ?
? DE34FG
(A) RYH (B) SYH
a) DE34FG b) DF34EG
(C) SZI (D) SYI
c) DG32FG d) DE32FG
Ex-6. ZSD, YTC, XUB, OUD, ?
Sol. 8: Here, the number series is +2, +4, +6, +8, ……….
So, 24+10 is 34. (A) VWZ (B) UVW
For the letter series, four letters are written in sequence. (C) VXY (D) UWZ
And the next four letters are skipped. Then next four letters Ex-7. KTE, SBM, AJU, IRC, ?
are written and again next four are skipped and so on. (A) OZL (B) QYZ
First set of four letters is PQRS, and number 4 is written in (C) QZL (D) QZX
the middle. Direction : (8 to 9) Find the wrong term(s) :
Then four letters are skipped. Second set of four letters are Ex-8. DOU, EPV, FQW, GRX, HTY, ITZ
written as XYZA, and 6 is written in the middle. (A) EPV (B) FQW
Then again four letters are skipped and four letters FGHI
(C) GRX (D) HTY
written and the number 10 is written in the middle, and so
Ex-9. ABC, DGJ, HMR, NTA, SBK, ZKV
on.
(A) DGA (B) HMR
So, the final answer is DE34FG. And hence, option A is the
correct answer. (C) NTA (D) SBK
NOTE: Students must understand that, at a time of solving Alpha-Numeric Series
alpha-numeric questions, they must understand the logic of Direction : (10) Find the missing term :
number series as well as alphabet series. The alpha-numeric Ex-10. F3X, H7U, J15R, L31O, ?
series is the combination of the two. Any pattern can be (A) M46L (B) N44L
there in the questions. (C) N63L (D) N44M

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Direction : (11) (A) RITG (B) RJGH
Ex-11. D4V, G10T, J20R, M43P, P90N (C) IRGT (D) HPIN
(A) G10T (B) J20R 12. BYCXA, EVFUD, HSIRG, KPLOJ, ?
(C) M43P (D) P90N (NTSE Stage-I)
EXERCISE : 1 (A) MNLOL (B) NMOLM
Directions : (1 to 41)Find the missing letters : (C) QJRIP (D) PKQJO
1. B, E, H, ? 13. UTRQU, QPNMT, MLJIS, IHFER, ?
(NTSE Stage-I)
(A) K (B) L
(A) EDCAQ (B) EDBAQ
(C) J (D) M
(C) IHFGP (D) KJHGP
2. Y, W, U, S, Q, ?
14. CDFI, EFHK, IJLO, KLNQ, OPRU, ?
(A) A (B) P
(NTSE Stage-I)
(C) O (D) B
(A) QRTW (B) MNPS
3. AH, DL, GP, JT, ? (C) QRST (D) RSUX
(A) MY (B) NX 15. CFIJ, RUXY, EHKL, PSVW, ?
(C) MX (D) NY (NTSE Stage-I)
4. LO, IL, FI, CF, ? (A) HILM (B) UXZA
(A) ZB (B) AB (C) SVYZ (D) MOSV
(C) ZC (D) ZO 16. BCFH, ?, HILN, KLOQ, NORT
5. ZYX, BAZ, DCB, FED, ? (NTSE Stage-I)
(A) GHF (B) FGH (A) MNQS (B) EFIK
(C) FFG (D) HGF (C) NOPQ (D) PQTV
6. ATL, BUM, CVN, DWO, ? 17. KMON, NPRQ, ?, TVXW, WYAZ
(A) EZP (B) EYQ (NTSE Stage-I)
(C) EFP (D) EXP (A) QSUT (B) QTUS
7. TYU, NSO, HMI, ? (C) UWYX (D) SUWV
(A) AGC (B) CGC 18. GRPT, HSQS, ITRR, ?, KVTP, LWUO
(C) GBC (D) BGC (NTSE Stage-I)
8. MAAL, AALM, ALMA, LMAA, ? (A) USJQ (B) QSUJ
(A) AMLA (B) MAAL (C) JSQR (D) JUSQ
(C) AAML (D) LAAM 19. XBI, JNU, VZG, HLS, ?
(NTSE Stage-I)
9. A3P, C5N, E8K, G12G, ?
(A) TYE (B) TXE
(A) I16D (B) I17B
(C) PTA (D) UYE
(C) I17D (D) J16B
20. AYCXB, EWGVF, IUKTJ, MSORN, ?
10. Q1F, S2F, U6D, W21C, ?
(NTSE Stage-I)
(A) Y66B (B) Y44B
(A) QOPPR (B) RPSQO
(C) Y88B (D) Z88B
(C) QQSPR (D) PQRPQ
11. BYDW, FUHS, JQLO, NMPK, ?
(NTSE Stage-I)
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21. AAZY, DDVU, GGRQ, ?, MMJI, PPFE 31. AZYB, CXVE, FURI, ? (NTSE Stage-II)
(NTSE Stage-II) (A) KQPL (B) JRNM
(A) KKMN (B) MMJN (C) JQMN (D) ISPM
(C) KKMM (D) JJNM 32. DOZ, GRC, (?), ALW, BMX (NTSE Stage-I)
22. ZDOA, VHNF, ? , NPLP, JTKU, FXJZ (A) BGL (B) LWH
(NTSE Stage-II) (C) DLT (D) GJM
(A) RLKM (B) MLRK 33. fed, jhg, lkj, (?), rqp (NTSE Stage-I)
(C) RKML (D) RLMK
(A) npq (B) onm
23. ZOA, XMF, ?, TIP, RGU, PEZ
(C) oqp (D) nom
(NTSE Stage-II)
34. ABYZ, ADWZ, (?), AHSZ (NTSE Stage-I)
(A) YXX (B) WLL
(A) AFUZ (B) AUFZ
(C) UKK (D) VKK
(C) ZFUA (D) ZUFA
24. CGJL, FJMO, IMPR, LPSU, ?
(NTSE Stage-I) 35. VTRP, NLJH, FDBZ, XVTR, (?)
(A) ORUW (B) OSVX (NTSE Stage-I)
(C) JMPR (D) KORS (A) JLPN (B) LJPN
25. ADCG, ?, JMLP, QTSW, UXWA (C) NPLJ (D)PNLJ
(NTSE Stage-I) 36. OBDR, QACT, SZBV, (?), WXZZ
(A) PSRV (B) PTSV (NTSE Stage-I)
(C) PRVS (D) PVRS (A) WUWZ (B) YTVB
26. ?, CAFH, YWBD, USXZ, QOTV (C) UYAX (D) ASVD
(NTSE Stage-I) 37. YANWY, DFMBD, IKNGI, NPMLN, (?)
(A) GELJ (B) INLN XZMVX (NTSE Stage-I)
(C) GEJL (D) PSNP (A) RUMSR (B) SUNQS
27. AYBX, EUFT, IQJP, MMNL, ? (C) UWNSU (D) VUMTV
(NTSE Stage-I) 38. PEXKW, RFWMU, TGVOS, VHUQQ, XITSO,
(A) QIRH (B) NLOK (?) (NTSE Stage-I)
(C) GSHR (D) PJQI (A) ZJSUM (B) YJSUZ
28. PQMN, NOKL, LMIJ, ?, HIEF (C) ZKSVJ (D) JZSTN
(NTSE Stage-I) 39. AYBZC, DWEXF, GUHVI, JSKTL, (?), POQPR
(A) KLHI (B) MNJK (NTSE Stage-I)
(C) GHIJ (D) JKGH (A) MQDRN (B) QMONR
29. ABHR, EFIO, IJJL, MNKI, UVMC (C) MQNRO (D) NQMOR
(NTSE Stage-II) 40. ZYYZR, ABVUN, (?), BCUTM, XWABT,
(A) QRLM (B) QRST CDTSL (NTSE Stage-I)
(C) QULM (D) QRLF (A) YXZAS (B) ZYABT
30. BDF, HKN, QUY, ?, RXD (NTSE Stage-II) (C) XWYZR (D) YXZAB
(A) CHM (B) BGL
(C) CIO (D) BHN
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41. deb, ijg, nol, (?), xyv (NTSE Stage-I) EXERCISE : 2
(A) rsp (B) stp Directions : (1 to 10) There is a wrong term in the
(C) rsq (D) stq following numbers/ letters series. Find the wrong
Directions : In each of the questions 42 to 44 some of term of the series.
the letters are missing in the given series with one 1. ABC, BCD, CDE, DEF, FEG
term missing shown by question mark (?). This (A) BCD (B) CDE
term is one of the alternatives among the four (C) DEF (D) FEG
groups of letters given under if find the right alter- 2. ZOA, XMF, VKK, THP, RGU, PEZ
native. (NTSE Stage-I) (A) THP (B) XMF
42. BEG, DGI, FIK, HKM, (?) (C) VKK (D) RGU
(A) JMO (B) KMO 3. AACC, BBED, CCHE, DDMF, EEQG
(C) JML (D) JNP (A) AACC (B) DDMF
43. KEM, IDL, GCK, (?), CAI (C) BBED (D) EEQG
(A) ECJ (B) EBK 4. ECA, JHF, OMK, TOP, YWU
(C) FBJ (D) EBJ (A) ECA (B) JHF
44. JCME, LDOG, NEQI, (?) (C) TQP (D) YWU
(A) PFSJ (B) PESI 5. DKY, FJW, HIT, JHS, LGQ
(C) PESK (D) PFSK (A) FJW (B) LGQ
45. FOX, IQV, LST, OUR, ? (NTSE Stage-I) (C) JHJ (D) HIT
(A) RPW (B) RWP 6. DVG, FSI, HPK, JNM, LJO
(C) QVS (D) SXU (A) DVG (B) JNM
46. qpo, nml, ? (NTSE Stage-I) (C) HPK (D) LJO
(A) ghf (B) ijk 7. ABD, DGK, HMS, NTB, SBL, ZKW
(C) kji (D) hgi (A) NTB (B) DGK
47. MYZ, LWX, ?, JST (NTSE Stage-I) (C) SBL (D) ZKW
(A) KUV (B) IQR 8. EPV, FQW, GRX, HTY, ITZ
(C) HOP (D) GMN (A) FQW (B) GRX
48. bdf, hjl _____, tvx (NTSE Stage-I) (C) HTY (D) ITZ
(A) nrp (B) pnr 9. PON, RQP, TSR, VVT, XWV, ZYX
(C) nqr (D) npr (A) VVT (B) TSR
49. LO, JQ, HS, ? (NTSE Stage-I) (C) XWV (D) RQP
(A) FU (B) FQ 10. P 3 C, R 5 F, T 8 I, V 12 L, X 18 O, Z 23 R
(C) EV (D) DW (A) V 12 L (B) X 18 O
50. ZXV, TRP, NLJ, ? (NTSE Stage-I) (C) Z 23 R (D) R 5 F
(A) HEF (B) HFD
(C) EFH (D) IGE

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