# SERIES

In a series, words, letters or digits are given in a order and you are asked to fulfill the series. You have to identify the missing letter or digit in between letters and numbers to continue to sequence followed in the question.

In this chapter there are three types of series completion questions. 1) Letter series, 2) Number series, 3) Letter and Number series.

Letter series:

In letter series some letters which follow a particular sequence of order. Out of this information find the missing letter or the next letter to continue the pattern.

Number series:

In this series numbers or digits are used. In this series also the pattern/ sequences involved. We should be able to find out the pattern/ sequence involved. Number series require simple manipulation of numbers.

a) Skipping the numbers in some set of order.

b) Addition, subtraction, multiplication or division of numbers to get the next number in the series.

c) Increase or decrease in numbers in a specific pattern or order.

Letter, Number mixed series:

In this series both alphabets and numerical digits are used. These series are also formed in the same patterns like the above explained letter and number series.

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?

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.

Posted Date : 23-03-2023

గమనిక : ప్రతిభ.ఈనాడు.నెట్‌లో కనిపించే వ్యాపార ప్రకటనలు వివిధ దేశాల్లోని వ్యాపారులు, సంస్థల నుంచి వస్తాయి. మరి కొన్ని ప్రకటనలు పాఠకుల అభిరుచి మేరకు కృత్రిమ మేధస్సు సాంకేతికత సాయంతో ప్రదర్శితమవుతుంటాయి. ఆ ప్రకటనల్లోని ఉత్పత్తులను లేదా సేవలను పాఠకులు స్వయంగా విచారించుకొని, జాగ్రత్తగా పరిశీలించి కొనుక్కోవాలి లేదా వినియోగించుకోవాలి. వాటి నాణ్యత లేదా లోపాలతో ఈనాడు యాజమాన్యానికి ఎలాంటి సంబంధం లేదు. ఈ విషయంలో ఉత్తర ప్రత్యుత్తరాలకు, ఈ-మెయిల్స్ కి, ఇంకా ఇతర రూపాల్లో సమాచార మార్పిడికి తావు లేదు. ఫిర్యాదులు స్వీకరించడం కుదరదు. పాఠకులు గమనించి, సహకరించాలని మనవి.