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SSC CGL Coding and Series Practice Test 1

15 original SSC CGL reasoning questions on coding-decoding, letter series, number series, and mixed sequences.

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SSC CGL Practice Session

SSC CGL Coding and Series Practice Test 1

15 original SSC CGL reasoning questions on coding-decoding, letter series, number series, and mixed sequences.

Questions
15
Marking
+2 correct, -0.5 wrong
Format
15-question ad-supported session
Preview all 15 questions in SSC CGL Coding and Series Practice Test 1 (no login required)
  1. Number Series

    1. Find the next number: 3, 6, 12, 24, ?

    • A. 30
    • B. 36
    • C. 42
    • D. 48 (Correct)

    Explanation: Each term doubles.

  2. Letter Series

    2. Find the next term: A, C, E, G, ?

    • A. H
    • B. I (Correct)
    • C. J
    • D. K

    Explanation: The letters move by two positions each time.

  3. Coding

    3. If CAT is coded as DBU, then RAT is coded as:

    • A. SBU (Correct)
    • B. TCV
    • C. SCV
    • D. TBU

    Explanation: Each letter is shifted one step ahead: R->S, A->B, T->U.

  4. Number Series

    4. Find the missing term: 2, 5, 10, 17, 26, ?

    • A. 35
    • B. 37 (Correct)
    • C. 39
    • D. 41

    Explanation: Differences are +3, +5, +7, +9, so next is +11.

  5. Letter Series

    5. Find the next term: ZA, YB, XC, ?

    • A. WD (Correct)
    • B. WE
    • C. VD
    • D. WC

    Explanation: First letter moves backward, second moves forward.

  6. Coding

    6. If PEN is coded as QFO, then BOOK is coded as:

    • A. CPPL (Correct)
    • B. CPLL
    • C. CPPK
    • D. CPPM

    Explanation: Each letter is moved one place forward.

  7. Mixed Series

    7. Find the next term: 1A, 2C, 3E, 4G, ?

    • A. 5H
    • B. 5I (Correct)
    • C. 6I
    • D. 6J

    Explanation: Numbers increase by one and letters by two positions.

  8. Number Series

    8. Find the next number: 4, 9, 19, 39, ?

    • A. 59
    • B. 69
    • C. 79 (Correct)
    • D. 89

    Explanation: Each term is previous x2 +1.

  9. Letter Series

    9. Find the next term: M, O, Q, S, ?

    • A. T
    • B. U (Correct)
    • C. V
    • D. W

    Explanation: The letters move forward by two positions.

  10. Coding

    10. If ROAD is coded as URDG, then GOAT is coded as:

    • A. JRDW (Correct)
    • B. JRDX
    • C. IPCV
    • D. KSEW

    Explanation: Each letter is shifted three positions ahead.

  11. Number Series

    11. Find the next number: 7, 14, 28, 56, ?

    • A. 84
    • B. 98
    • C. 112 (Correct)
    • D. 120

    Explanation: Each term doubles.

  12. Letter Series

    12. Find the next term: B, F, J, N, ?

    • A. P
    • B. Q
    • C. R (Correct)
    • D. S

    Explanation: Letters move forward by four positions.

  13. Coding

    13. If in a code, 321 means 'go and sleep', 145 means 'eat and rest', then the code for 'and' is:

    • A. 1 (Correct)
    • B. 2
    • C. 3
    • D. 4

    Explanation: The common word in both phrases is 'and', so the common digit is its code.

  14. Mixed Series

    14. Find the next term: C2, F4, I6, L8, ?

    • A. M10
    • B. O10 (Correct)
    • C. P12
    • D. N10

    Explanation: Letters move by three positions and numbers by two.

  15. Number Series

    15. Find the next number: 11, 13, 17, 23, 31, ?

    • A. 37
    • B. 39
    • C. 41 (Correct)
    • D. 43

    Explanation: These are consecutive prime numbers.