Coding & Decoding Problems MCQs

Solved Coding & Decoding Problems MCQs with answers and explanations. Free practice questions for PPSC, FPSC, CSS and other government job exams on FreeSekho.

1. 1. If A=1, B=2, C=3, ..., Z=26, what is the code for the word SUN, where each letter's number is written in order and separated by a hyphen?

   1. 18-20-13
   2. 19-21-14 ✓
   3. 20-22-15
   4. 14-21-19

2. 2. In a certain code, each letter is replaced by the letter that occupies the mirror-image position in the alphabet (A becomes Z, B becomes Y, and so on). If CAMERA is written as XZNVIZ, how is RIVER written in that code?

   1. IREWI
   2. IRFVI
   3. IREVI ✓
   4. IREVJ

3. 3. In a certain code: WATER = : * $ - &; SUN = [ | \. What is the code for RUN?

   1. + | \
   2. \ | &
   3. | \ &
   4. & | \ ✓

4. 4. If A=1, B=2, C=3, ..., Z=26, what is the code for the word PLANE, where each letter's number is written in order and separated by a hyphen?

   1. 17-13-2-15-6
   2. 15-11-3-13-4
   3. 16-12-1-14-5 ✓
   4. 5-14-1-12-16

5. 5. Using a code where A=Z, B=Y, C=X and so on, WINTER is coded as DRMGVI. What is the code for DOG?

   1. WLU
   2. WMT
   3. XLT
   4. WLT ✓

6. 6. If X @ Y means X is the father of Y, and Y ! Z means Y is the brother of Z, how is X related to Z?

   1. Grandfather
   2. Uncle
   3. Father ✓
   4. Brother

7. 7. In a certain code, each letter is replaced by the letter that occupies the mirror-image position in the alphabet (A becomes Z, B becomes Y, and so on). If FLOWER is written as UOLDVI, how is TRAIN written in that code?

   1. HIZRM
   2. GIZRM ✓
   3. GIZRN
   4. GJZRM

8. 8. If every letter in a word is shifted 4 places forward through the alphabet, and YELLOW becomes CIPPSA, what does BAT become?

   1. EDW
   2. XWP
   3. FEX ✓
   4. GFY

9. 9. In a certain code: LIGHT = ! = | \ (; CLOUD = % ! & - <. What is the code for DOG?

   1. < & | ✓
   2. + & |
   3. & | <
   4. | & <

10. 10. If each letter is given a value such that A=26, B=25, ..., Z=1, what is the sum of the letter-values in the word CLOUD?

    1. 83
    2. 80 ✓
    3. 79
    4. 82

11. 11. If X ~ Y means X is the daughter of Y, and Y % Z means Y is the mother of Z, how is X related to Z? (X is not Z)

    1. Sister ✓
    2. Mother
    3. Daughter
    4. Aunt

12. 12. If 'Five' is called 'Eight', 'Eight' is called 'One', 'One' is called 'Three', what is 'Eight' called?

    1. One ✓
    2. Five
    3. Three
    4. Eight

13. 13. If 'Apple' is called 'Orange', 'Orange' is called 'Grape', 'Grape' is called 'Papaya', which fruit is called 'Orange'?

    1. Grape
    2. Orange
    3. Mango
    4. Apple ✓

14. 14. If A=1, B=2, C=3, ..., Z=26, what is the code for the word CAT, where each letter's number is written in order and separated by a hyphen?

    1. 3-1-20 ✓
    2. 2-3-19
    3. 4-2-21
    4. 20-1-3

15. 15. If 'Jasmine' is called 'Tulip', 'Tulip' is called 'Lily', 'Lily' is called 'Rose', 'Rose' is called 'Daisy', 'Daisy' is called 'Lotus', what is 'Tulip' called?

    1. Rose
    2. Lily ✓
    3. Daisy
    4. Tulip

16. 16. In a certain code: LIGHT = $ - % ( ~; WATER = : @ ~ ) |. What is the code for HAT?

    1. ( @ ~ ✓
    2. @ ~ (
    3. ~ @ (
    4. & @ ~

17. 17. If X ! Y means X is the brother of Y, and Y % Z means Y is the mother of Z, how is X related to Z?

    1. Brother
    2. Father
    3. Uncle ✓
    4. Grandfather

18. 18. If each letter is given a value such that A=1, B=2, ..., Z=26, what is the sum of the letter-values in the word CAT?

    1. 27
    2. 26
    3. 24 ✓
    4. 25

19. 19. In a certain code, each letter of a word is moved 2 steps forward in the alphabet. If NIGHT is written as PKIJV, how is STONE written in that code?

    1. TUPOF
    2. UVQPG ✓
    3. VWRQH
    4. QRMLC

20. 20. If P @ Q means P is the father of Q, and Q @ R means Q is the father of R, how is P related to R?

    1. Uncle
    2. Father
    3. Grandfather ✓
    4. Brother

21. 21. If each letter is given a value such that A=1, B=2, ..., Z=26, what is the sum of the letter-values in the word MUSIC?

    1. 68
    2. 67
    3. 63
    4. 65 ✓

22. 22. If A ? B means A is the son of B, and B @ C means B is the father of C, how is A related to C? (assume A is not C)

    1. Brother ✓
    2. Son
    3. Father
    4. Uncle

23. 23. If A % B means A is the mother of B, and B % C means B is the mother of C, and C & D means C is the sister of D, how is A related to D?

    1. Grandmother ✓
    2. Mother
    3. Aunt
    4. Great-grandmother

24. 24. If A=1, B=2, C=3, ..., Z=26, what is the code for the word BROWN, where each letter's number is written in order and separated by a hyphen?

    1. 1-17-14-22-13
    2. 2-18-15-23-14 ✓
    3. 3-19-16-24-15
    4. 14-23-15-18-2

25. 25. If 'March' is called 'June', 'June' is called 'February', 'February' is called 'May', 'May' is called 'August', what is 'May' called?

    1. May
    2. February
    3. August ✓
    4. June

26. 26. If M % N means M is the mother of N, and N & O means N is the sister of O, how is M related to O?

    1. Grandmother
    2. Aunt
    3. Mother ✓
    4. Sister

27. 27. If 'Mango' is called 'Papaya', 'Papaya' is called 'Banana', 'Banana' is called 'Apple', 'Apple' is called 'Orange', which fruit is called 'Papaya'?

    1. Apple
    2. Guava
    3. Mango ✓
    4. Banana

28. 28. If A=26, B=25, C=24, ..., Z=1 (reverse order), what is the code for the word GLASS, where each letter's number is written in order and separated by a hyphen?

    1. 21-16-27-9-9
    2. 20-15-26-8-8 ✓
    3. 19-14-25-7-7
    4. 8-8-26-15-20

29. 29. If every letter in a word is shifted 3 places forward through the alphabet, and BLACK becomes EODFN, what does WATER become?

    1. ZDWHU ✓
    2. AEXIV
    3. TXQBO
    4. YCVGT

30. 30. In a certain code: NIGHT = ? @ ~ } &; TABLE = & * < ; ]. What is the code for HAT?

    1. & * }
    2. * & }
    3. } * & ✓
    4. ; * &

31. 31. In a certain code, each letter of a word is moved 4 steps forward in the alphabet. If BENCH is written as FIRGL, how is FRIEND written in that code?

    1. JVMIRH ✓
    2. BNEAJZ
    3. KWNJSI
    4. IULHQG

32. 32. If K & L means K is the sister of L, and L ? M means L is the son of M, how is K related to M?

    1. Mother
    2. Aunt
    3. Daughter ✓
    4. Sister

33. 33. If 'Three' is called 'Five', 'Five' is called 'Six', 'Six' is called 'Two', 'Two' is called 'Seven', 'Seven' is called 'Eight', which number is called 'Two'?

    1. Five
    2. Four
    3. Three
    4. Six ✓

34. 34. In a certain code, each letter of a word is moved 3 steps forward in the alphabet. If WATER is written as ZDWHU, how is GREEN written in that code?

    1. JUHHQ ✓
    2. DOBBK
    3. KVIIR
    4. ITGGP

35. 35. If A % B means A is the mother of B, and B % C means B is the mother of C, how is A related to C?

    1. Sister
    2. Mother
    3. Aunt
    4. Grandmother ✓

36. 36. If 'Three' is called 'Five', 'Five' is called 'Six', 'Six' is called 'Eight', 'Eight' is called 'Seven', 'Seven' is called 'Two', what is 'Eight' called?

    1. Three
    2. Five
    3. Two
    4. Seven ✓

37. 37. If A=1, B=2, C=3, ..., Z=26, what is the code for the word CLOCK, where each letter's number is written in order and separated by a hyphen?

    1. 4-13-16-4-12
    2. 2-11-14-2-10
    3. 11-3-15-12-3
    4. 3-12-15-3-11 ✓

38. 38. If each letter is given a value such that A=1, B=2, ..., Z=26, what is the sum of the letter-values in the word KNIFE?

    1. 47
    2. 46
    3. 45 ✓
    4. 44

39. 39. In a certain code, each letter of a word is moved 3 steps forward in the alphabet. If SUN is written as VXQ, how is CLOCK written in that code?

    1. ENQEM
    2. ZILZH
    3. FORFN ✓
    4. GPSGO

40. 40. If P @ Q means P is the father of Q, and Q @ R means Q is the father of R, how is R related to P?

    1. Grandson ✓
    2. Nephew
    3. Father
    4. Son

41. 41. If 'August' is called 'July', 'July' is called 'May', 'May' is called 'March', 'March' is called 'April', what is 'May' called?

    1. August
    2. April
    3. March ✓
    4. January

42. 42. If every letter in a word is shifted 5 places forward through the alphabet, and WINTER becomes BNSYJW, what does CHALK become?

    1. GLEPO
    2. INGRQ
    3. XCVGF
    4. HMFQP ✓

43. 43. If M & N means M is the sister of N, and N % O means N is the mother of O, how is M related to O?

    1. Aunt ✓
    2. Grandmother
    3. Sister
    4. Mother

44. 44. If 'Four' is called 'Six', 'Six' is called 'Three', 'Three' is called 'Seven', 'Seven' is called 'One', 'One' is called 'Eight', what is 'Three' called?

    1. Seven ✓
    2. Five
    3. One
    4. Eight

45. 45. If each letter is given a value such that A=26, B=25, ..., Z=1, what is the sum of the letter-values in the word TIGER?

    1. 77
    2. 78
    3. 76 ✓
    4. 74

46. 46. If each letter is given a value such that A=1, B=2, ..., Z=26, what is the sum of the letter-values in the word HAT?

    1. 27
    2. 30
    3. 31
    4. 29 ✓

47. 47. If each letter is given a value such that A=26, B=25, ..., Z=1, what is the sum of the letter-values in the word TABLE?

    1. 96
    2. 93
    3. 97
    4. 95 ✓

48. 48. If A=1, B=2, C=3, ..., Z=26, what is the code for the word MOUSE, where each letter's number is written in order and separated by a hyphen?

    1. 5-19-21-15-13
    2. 12-14-20-18-4
    3. 14-16-22-20-6
    4. 13-15-21-19-5 ✓

49. 49. If P @ Q means P is the father of Q, and Q @ R means Q is the father of R, and R ! S means R is the brother of S, how is P related to S?

    1. Uncle
    2. Great-grandfather
    3. Grandfather ✓
    4. Father

50. 50. Using a code where A=Z, B=Y, C=X and so on, PEN is coded as KVM. What is the code for CASTLE?

    1. XZHGOV ✓
    2. XZIGOV
    3. YZHGOV
    4. XZHGOW

51. 51. If A=1, B=2, C=3, ..., Z=26, what is the code for the word DOG, where each letter's number is written in order and separated by a hyphen?

    1. 4-15-7 ✓
    2. 7-15-4
    3. 5-16-8
    4. 3-14-6

52. 52. If every letter in a word is shifted 5 places forward through the alphabet, and GREEN becomes LWJJS, what does ROCKET become?

    1. VSGOIX
    2. MJXFZO
    3. WTHPJY ✓
    4. XUIQKZ

53. 53. If 'Black' is called 'Yellow', 'Yellow' is called 'Green', 'Green' is called 'White', 'White' is called 'Orange', which colour is called 'Yellow'?

    1. Black ✓
    2. Orange
    3. Blue
    4. Green

54. 54. In a certain code, each letter of a word is moved 2 steps forward in the alphabet. If VALLEY is written as XCNNGA, how is PLANET written in that code?

    1. NJYLCR
    2. SODQHW
    3. RNCPGV ✓
    4. QMBOFU

55. 55. In a certain code: PAPER = ] ( ] = ^; LIGHT = * + ) ; }. What is the code for TIGER?

    1. } + ) = ^ ✓
    2. + ) = ^ }
    3. : + ) = ^
    4. ^ = ) + }

56. 56. If every letter in a word is shifted 2 places forward through the alphabet, and ROCKET becomes TQEMGV, what does TABLE become?

    1. WDEOH
    2. VCDNG ✓
    3. RYZJC
    4. UBCMF

57. 57. Using a code where A=Z, B=Y, C=X and so on, PENCIL is coded as KVMXRO. What is the code for STONE?

    1. HGMMV
    2. HHLMV
    3. HGLMV ✓
    4. HGLMW

58. 58. In a certain code, each letter of a word is moved 1 steps backward in the alphabet. If MUSIC is written as LTRHB, how is HOUSE written in that code?

    1. FMSQC
    2. GNTRD ✓
    3. IPVTF
    4. HOUSE

59. 59. If 'Three' is called 'Four', 'Four' is called 'Seven', 'Seven' is called 'Six', 'Six' is called 'Eight', 'Eight' is called 'Five', what is 'Six' called?

    1. Seven
    2. Five
    3. Two
    4. Eight ✓

60. 60. If A=26, B=25, C=24, ..., Z=1 (reverse order), what is the code for the word GRAPE, where each letter's number is written in order and separated by a hyphen?

    1. 19-8-25-10-21
    2. 20-9-26-11-22 ✓
    3. 22-11-26-9-20
    4. 21-10-27-12-23

61. 61. In a certain code: MOUSE = ~ ? ( * ); LAMP = | / ~ !. What is the code for APPLE?

    1. ! ! | ) /
    2. ) | ! ! /
    3. > ! ! | )
    4. / ! ! | ) ✓

62. 62. In a certain code: BAT = ? | [; LIGHT = # * > ! [. What is the code for HAT?

    1. | [ !
    2. / | [
    3. [ | !
    4. ! | [ ✓

63. 63. Using a code where A=Z, B=Y, C=X and so on, ISLAND is coded as RHOZMW. What is the code for TABLE?

    1. GZYOV ✓
    2. GAYOV
    3. HZYOV
    4. GZYPV

64. 64. If P ! Q means P is the brother of Q, and Q @ R means Q is the father of R, how is R related to P?

    1. Son
    2. Nephew ✓
    3. Cousin
    4. Brother

65. 65. If each letter is given a value such that A=26, B=25, ..., Z=1, what is the sum of the letter-values in the word DESK?

    1. 72
    2. 71
    3. 69 ✓
    4. 67

66. 66. If P @ Q means P is the father of Q, and R % Q means R is the mother of Q, how is P related to R?

    1. Father
    2. Son
    3. Husband ✓
    4. Brother

67. 67. In a certain code: STORM = } # ; - &; APPLE = + ? ? ! (. What is the code for PAPER?

    1. + ? ( - ?
    2. - ( ? + ?
    3. ] + ? ( -
    4. ? + ? ( - ✓

68. 68. If 'Seven' is called 'Six', 'Six' is called 'Three', 'Three' is called 'Two', 'Two' is called 'One', what is 'Two' called?

    1. Five
    2. Three
    3. One ✓
    4. Six

69. 69. In a certain code, each letter of a word is moved 1 steps backward in the alphabet. If MUSIC is written as LTRHB, how is BROWN written in that code?

    1. BROWN
    2. AQNVM ✓
    3. CSPXO
    4. ZPMUL

70. 70. In a certain code: HAT = & * $; BREAD = > ? ( * /. What is the code for BAT?

    1. > * $ ✓
    2. * $ >
    3. $ * >
    4. } * $

71. 71. If 'Orange' is called 'Guava', 'Guava' is called 'Papaya', 'Papaya' is called 'Apple', 'Apple' is called 'Banana', what is 'Orange' called?

    1. Mango
    2. Guava ✓
    3. Banana
    4. Apple

72. 72. If every letter in a word is shifted 2 places forward through the alphabet, and WHITE becomes YJKVG, what does CLOCK become?

    1. FORFN
    2. ENQEM ✓
    3. AJMAI
    4. DMPDL

73. 73. In a certain code, each letter of a word is moved 2 steps backward in the alphabet. If ORANGE is written as MPYLEC, how is QUEEN written in that code?

    1. OSCCL ✓
    2. PTDDM
    3. SWGGP
    4. NRBBK

74. 74. If A=1, B=2, C=3, ..., Z=26, what is the code for the word CHALK, where each letter's number is written in order and separated by a hyphen?

    1. 2-7-3-11-10
    2. 3-8-1-12-11 ✓
    3. 11-12-1-8-3
    4. 4-9-2-13-12

75. 75. In a certain code: CLOUD = $ ! + / ); MANGO = ] : - | +. What is the code for DOG?

    1. + | )
    2. ) + | ✓
    3. @ + |
    4. | + )

76. 76. In a certain code, each letter of a word is moved 5 steps forward in the alphabet. If STORM is written as XYTWR, how is PEN written in that code?

    1. UJS ✓
    2. KZI
    3. TIR
    4. VKT

77. 77. In a certain code, each letter of a word is moved 2 steps forward in the alphabet. If DANCE is written as FCPEG, how is HOUSE written in that code?

    1. FMSQC
    2. IPVTF
    3. JQWUG ✓
    4. KRXVH

78. 78. If each letter is given a value such that A=26, B=25, ..., Z=1, what is the sum of the letter-values in the word PEN?

    1. 49
    2. 48
    3. 46 ✓
    4. 44

79. 79. Using a code where A=Z, B=Y, C=X and so on, BRIDGE is coded as YIRWTV. What is the code for ROCKET?

    1. IMXPVG
    2. ILXPVG ✓
    3. ILYPVG
    4. ILXPVH

80. 80. If A=1, B=2, C=3, ..., Z=26, what is the code for the word BOOK, where each letter's number is written in order and separated by a hyphen?

    1. 11-15-15-2
    2. 1-14-14-10
    3. 2-15-15-11 ✓
    4. 3-16-16-12

81. 81. If 'Cow' is called 'Goat', 'Goat' is called 'Lion', 'Lion' is called 'Horse', which animal is called 'Goat'?

    1. Dog
    2. Goat
    3. Lion
    4. Cow ✓

82. 82. If A=26, B=25, C=24, ..., Z=1 (reverse order), what is the code for the word WHITE, where each letter's number is written in order and separated by a hyphen?

    1. 4-19-18-7-22 ✓
    2. 22-7-18-19-4
    3. 5-20-19-8-23
    4. 3-18-17-6-21

83. 83. If each letter is given a value such that A=26, B=25, ..., Z=1, what is the sum of the letter-values in the word STORM?

    1. 48
    2. 50 ✓
    3. 49
    4. 51

84. 84. If each letter is given a value such that A=1, B=2, ..., Z=26, what is the sum of the letter-values in the word APPLE?

    1. 51
    2. 48
    3. 50 ✓
    4. 49

85. 85. In a certain code: BREAD = - ; ( & #; GRAPE = % ; & = (. What is the code for PAPER?

    1. ; ( = & =
    2. / & = ( ;
    3. & = ( ; =
    4. = & = ( ; ✓

86. 86. In a certain code, each letter of a word is moved 2 steps backward in the alphabet. If SUN is written as QSL, how is CHAIR written in that code?

    1. AFYGP ✓
    2. BGZHQ
    3. EJCKT
    4. ZEXFO

87. 87. If 'Two' is called 'Five', 'Five' is called 'Six', 'Six' is called 'Three', which number is called 'Three'?

    1. Seven
    2. Six ✓
    3. Five
    4. Two

88. 88. If 'March' is called 'January', 'January' is called 'April', 'April' is called 'June', which month is called 'April'?

    1. January ✓
    2. February
    3. June
    4. March

89. 89. If every letter in a word is shifted 2 places forward through the alphabet, and CLOCK becomes ENQEM, what does ROCKET become?

    1. PMAICR
    2. TQEMGV ✓
    3. URFNHW
    4. SPDLFU

90. 90. If 'Sunday' is called 'Wednesday', 'Wednesday' is called 'Tuesday', 'Tuesday' is called 'Thursday', which day is called 'Tuesday'?

    1. Saturday
    2. Sunday
    3. Wednesday ✓
    4. Tuesday

91. 91. If every letter in a word is shifted 2 places forward through the alphabet, and SCHOOL becomes UEJQQN, what does TABLE become?

    1. WDEOH
    2. VCDNG ✓
    3. RYZJC
    4. UBCMF

92. 92. If M ~ N means M is the daughter of N, and N % O means N is the mother of O, how is M related to O? (M is not O)

    1. Daughter
    2. Mother
    3. Aunt
    4. Sister ✓

93. 93. If each letter is given a value such that A=1, B=2, ..., Z=26, what is the sum of the letter-values in the word DESK?

    1. 39 ✓
    2. 37
    3. 42
    4. 41

94. 94. In a certain code: PEN = ; * |; MUSIC = ] : $ = ^. What is the code for SUN?

    1. | : $
    2. : | $
    3. < : |
    4. $ : | ✓

95. 95. In a certain code, each letter is replaced by the letter that occupies the mirror-image position in the alphabet (A becomes Z, B becomes Y, and so on). If WINTER is written as DRMGVI, how is KNIFE written in that code?

    1. QMRUV
    2. PMRUV ✓
    3. PMRVV
    4. PNRUV

96. 96. In a certain code: MOUSE = : > ] \ @; LAMP = / ^ : |. What is the code for APPLE?

    1. @ / | | ^
    2. ^ | | / @ ✓
    3. | | / @ ^
    4. ( | | / @

97. 97. If A=1, B=2, C=3, ..., Z=26, what is the code for the word PAPER, where each letter's number is written in order and separated by a hyphen?

    1. 15-3-15-4-17
    2. 17-2-17-6-19
    3. 18-5-16-1-16
    4. 16-1-16-5-18 ✓

98. 98. Using a code where A=Z, B=Y, C=X and so on, PEN is coded as KVM. What is the code for PENCIL?

    1. KWMXRO
    2. KVMXRO ✓
    3. KVMXRP
    4. KVMYRO

99. 99. In a certain code: MUSIC = + < # } /; HOUSE = | { < # ;. What is the code for MOUSE?

    1. + { < # ; ✓
    2. / { < # ;
    3. ; # < { +
    4. { < # ; +

100. 100. In a certain code: CHALK = [ < ? ( @; TABLE = ; ? ) ( #. What is the code for BAT?

     1. \ ? ;
     2. ? ; )
     3. ) ? ; ✓
     4. ; ? )