Exercise:
* AD, EH, IL, ?, QT.
1) LM 2) MN 3) MP 4) OM 5) None of these
Ans: 3.
Hint: The first and second letters of each term are moved four steps forward to obtain the corresponding letters of the next term.
* JE, LH, OL, SQ, ?
1) WV 2) WX 3) VW 4) XW 5) None of these
Ans: 4.
Hint: The first letter of the first, second, third ... terms are respectively moved two, three, four,
... steps forward while the second letters of these terms are respectively moved three, four, five, ... steps forward to obtain the corresponding letters of the successive terms.
* cx fu ir ? ol ri.
1) lo 2) mn 3) no 4) op 5) None of these
Ans: 1.
Hint: The first letter of each term is moved three steps forward and the second letter is moved three steps backward to obtain the corresponding letters of the next term.
* CAT, FDW, IGZ, ?
1) KJA 2) KTC 3) LHD 4) LJC 5) None of these
Ans: 4.
Hint: All the letters of each term are moved three steps forward to obtain the corresponding letters of the next term.
* BEH, KNQ, TWZ, ?
1) IJL 2) CFI 3) BDF 4) ADG 5) None of these
Ans: 2.
Hint: All the letters of each term are moved three steps forward to obtain the corresponding letters of the next term.
* BEH, KNQ, TWZ, ?
1) IJL 2) CFI 3) BDF 4) ADG 5) None of these
Ans: 2.
Hint: All the letters of each term are moved nine steps forward to obtain the corresponding letters of the next term.
* FLP, INS, LPV, ?
1) ORY 2) UXZ 3) VXY 4) SVW 5) None of these
Ans: 1.
Hint: The first and third letters of each term are moved three steps forward and the
second letter is moved two steps forward to obtain the corresponding letters of the next term.
* shg rif qje pkd ?
1) ole 2) olc 3) nmc 4) nlb 5) None of these
Ans: 2.
Hint: The first and third letters of each term are moved one step backward and the second letter is moved one step forward to obtain the corresponding letters of the next term.
* LXF, MTJ, NPN, OLR, ?
1) PHV 2) PIU 3) PJW 4) PKX 5) None of these
Ans: 1.
* MHZ, NIW, OKT, PNQ, ?
1) RRN 2) QRN 3) QRM 4) QQN 5) None of these
Ans: 2.
* Which of the following will come in place of the question mark (?) in the following letter series based on their position in English alphabet?
UPI ? ODP MBQ IAW
1) TIJ 2) SIK 3) SHJ 4) THK 5) SHO
Ans: 3.
11. Which of the following groups of letters should come in the place of the question mark (?) in the series formed by letter groups of English alphabet given below?
AZB CYD EXF ? IVJ
1) GUH 2) GHU 3) GWH 4) GHW 5) None of these
Ans: 3.
* What should come in the place of question mark (?) in the following series?
ATTRIBUTION, TTRIBUTIO, RIBUTIO, IBUTI, ?
1) BUT 2) UTI 3) UT 4) IBU 5) None of these
Ans: 2.
* What should come in the place of question mark(?) in the following letter
sequence ?
AZB, CYD, EXF, ?, IVJ, KUL
1) FYH 2) GWG 3) HWH 4) GUF 5) None of these
Ans: 5.
* What should come in the blank space in the following series? M N O L R I V −
1) E 2) F 3) Z 4) H 5) A
Ans: 1.
* What should come in the place of question mark (?) in the following series?
BZA DYC FXE ? JVI
1) WHG 2) HUG 3) HWG 4) UHG 5) None of these
Ans: 3.
* c-baa-aca-cacab-acac-bca
1) acbaa 2) bbcaa 3) bccab 4) cbaac 5) None of these
Ans: 1.
Hint: The series is cab/ aa/ cacab/ cacab/ aa/ cacab/ ca. Thus, the pattern cacab, cacab, cacab, aa is repeated.
* c-bbb--abbbb-abbb-
1) aabcb 2) abccb 3) abacb 4) bacbb 5) None of these
Ans: 2.
Hint: The series is cabbbb / cabbbb / cabbbb. Thus, the pattern cabbbb is repeated.
* b-abbc-bbca-bcabb-ab
1) acaa 2) acba 3) cabc 4) cacc 5) None of these
Ans: 3.
Hint: The series is bcab/ bcab / bcab / bcab / bcab. Thus, the pattern bcab is repeated.
* ac-cab-baca-aba-acac
1) aacb 2) acbc 3) babb 4) bcbb 5) None of these
Ans: 1.
Hint: The series is acac / abab / acac / abab / acac. Thus, the pattern acac, abab is repeated.
* -acca-ccca-acccc-aaa
1) acca 2) caaa 3) ccaa 4) caac 5) None of these
Ans: 2.
Hint: The series is ca / ccaa / cccaa / ccccaaaa.
Number series:
* 3, 6, 18, 72, (...)
1) 144 2) 216 3) 288 4) 360 5) None of these
Ans:4.
Hint: The pattern is x2, x3, x4, ... ∴ Missing number = 72 × 5 = 360.
* 21, 25, 33, 49, 81, (...)
1) 145 2) 129 3) 113 4) 97 5) None of these
Ans: 1.
Hint: The pattern is + 4, + 8, + 16, + 32, ... i.e + 22, + 23, + 24, + 25 ...
... Missing number= 81 + 26 = 81 + 64 = 145
* 12, 32, 72, 152, (...)
1) 312 2) 325 3) 515 4) 613 5) None of these
Ans: 1.
Hint: The pattern is + 20, +40, +80, ... ∴ Missing number = 152 + 160 = 312.
* 2, 15, 41, 80, (...)
1) 111 2) 120 3) 121 4) 132 5) None of these
Ans: 4.
Hint: The pattern is + 13, + 26, + 39, ... ∴ Missing number = 80 + 52 =132.
* 8, 10, 14, 18, (...) , 34, 50, 66
1) 24 2) 25 3) 26 4) 27 5) None of these
Ans: 3.
Hint: The pattern is +2, +4, +4, ... +16, +16. ∴ Missing number = 18 + 8 = 26.
* 1, 2, 6, 24, (...)
1) 60 2) 95 3) 120 4) 150 5) None of these
Ans: 3.
Hint: The pattern is x2, x3, x4, ... ∴ Missing number = 24 × 5 = 120.
* 2, 3, 8, 63, (...)
1) 1038 2) 1998 3) 3008 4) 3968 5) None of these
Ans: 4.
Hint: Each term in the series is one less than the square of the preceding term. Thus,
22 −1 = 3, 32 -1 = 8, 82 −1 = 63. ∴ Missing term = 632 −1 = 3969 −1 = 3968.
* 95, 115.5, 138, (...) , 189
1) 154.5 2) 162.5 3) 164.5 4) 166.5 5) None of these
Ans: 2.
Hint: The pattern is + 20.5, +22.5, .. ∴ Missing term = 138 +24.5 = 162.5.
* 4, 10, (...) , 82, 244, 730
1) 24 2) 28 3) 77 4) 218 5) None of these
Ans: 2.
* 24, 60, 120, 210, (...)
1) 300 2) 336 3) 420 4) 525 5) None of these
Ans: 2.
Letter, Number mixed series:
* Which of the following will come in place of the question mark (?) in the following letter-number series? M3V 05U R7T T9S W11R ?
1) Y13Q 2) Z13Q 3) Y15Q 4) Y13P 5) None of these
Ans: 1.
* Which of the following will come in place of the question mark (?) in the following letter-number series? B6D, C12I, D20P, ?
1) E30Y 2) E30Q 3) E30S 4) Can't be determined 5) None of these
Ans: 1.
Hint: The number series: 22+2, 32+3, 42+4, 52+5. The letter series is following;
2 = B, 22 = D, 3 = C, 32 = I, 4 = D, 42= P, 5 = E, 52 = Y.
* What will come in place of question mark (?) in the following series?
X5C, U8F, ?, O17L, L23O
1) R10K 2) P12I 3) R12I 4) R10I 5) None of these
Ans: 3.
Hint: The left letter moves three letters backward while the right one moves three letters forward. The number in the middle increases by 3,4, 5, 6, ...
* What should come in place of the question mark (?) in the following series?
C0G, E2I, ?, I12M
1) G4K 2) G6K 3) G8K 4) H5L 5) None of these
Ans: 2.
* Which of the following will come in place of the question mark (?) in the following letter-number series?
C1A, F4E, H9I, ?, M25U
1) J160 2) J16M 3) K16O 4) K16Q 5) None of these
Ans: 3.
Hint: The first character of each group is taken from consonants. Starting with 'c' every alternate letter is taken. The second characters of each group a squares of natural nos. The third characters are vowels.
