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Logical Reasoning Test Practice Course: Number and letter series

Quiz sa paksa na walang limitasyon sa oras: 18 tanong tungkol sa Number and letter series, may paliwanag pagkatapos ng bawat sagot. Binabago ang ayos ng mga tanong at sagot sa bawat pagkakataon.

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  • Canada
  • 99 tanong
  • Sinuri noong Oktubre 13, 2026
  • Na-fact-check noong Oktubre 13, 2026
Magsimula sa mga aralinLogical Reasoning Course: Lessons: mga 180 minutong pagbasa. Saklaw ng mga aralin ang bawat tanong sa pagsusulit.

Quiz sa paksa 2: Number and letter series

  1. Tanong 1 ng 18

    What number comes next in the series 4, 9, 14, 19, ?
    Ipakita ang sagot

    Sagot: D. 24

    Each number is 5 more than the one before: 19 + 5 = 24.

  2. Tanong 2 ng 18

    What number comes next in the series 3, 6, 12, 24, ?
    Ipakita ang sagot

    Sagot: A. 48

    Each number is double the one before: 24 × 2 = 48.

  3. Tanong 3 ng 18

    What number comes next in the series 81, 72, 63, 54, ?
    Ipakita ang sagot

    Sagot: D. 45

    Each number is 9 less than the one before: 54 − 9 = 45.

  4. Tanong 4 ng 18

    What letter comes next in the series A, C, E, G, ?
    Ipakita ang sagot

    Sagot: D. I

    The letters skip one each time: A(1), C(3), E(5), G(7), so next is position 9, which is I.

  5. Tanong 5 ng 18

    What number comes next in the series 1, 4, 9, 16, 25, ?
    Ipakita ang sagot

    Sagot: D. 36

    These are square numbers: 1×1, 2×2, 3×3, 4×4, 5×5. Next is 6 × 6 = 36.

  6. Tanong 6 ng 18

    What letter comes next in the series Z, W, T, Q, ?
    Ipakita ang sagot

    Sagot: A. N

    The letters go back 3 each time: Z(26), W(23), T(20), Q(17), so next is 14, which is N.

  7. Tanong 7 ng 18

    What number comes next in the series 5, 7, 11, 17, 25, ?
    Ipakita ang sagot

    Sagot: D. 35

    The differences are 2, 4, 6, 8, so the next difference is 10: 25 + 10 = 35.

  8. Tanong 8 ng 18

    What comes next in the series A1, C3, E5, G7, ?
    Ipakita ang sagot

    Sagot: A. I9

    Each letter skips one, and the number is the letter's position in the alphabet: I is the 9th letter, so I9.

  9. Tanong 9 ng 18

    What number comes next in the series 2, 5, 11, 23, ?
    Ipakita ang sagot

    Sagot: A. 47

    Each number is doubled and then 1 is added: 23 × 2 + 1 = 47.

  10. Tanong 10 ng 18

    What number comes next in the series 2, 3, 5, 8, 13, ?
    Ipakita ang sagot

    Sagot: D. 21

    Each number is the sum of the two before it: 5 + 8 = 13, so 8 + 13 = 21.

  11. Tanong 11 ng 18

    What comes next in the series AZ, BY, CX, DW, ?
    Ipakita ang sagot

    Sagot: A. EV

    The first letter moves forward one place (A, B, C, D, E) and the second moves back one place (Z, Y, X, W, V).

  12. Tanong 12 ng 18

    What number comes next in the series 10, 3, 12, 6, 14, 9, ?
    Ipakita ang sagot

    Sagot: C. 16

    Two series alternate: 10, 12, 14 (add 2) and 3, 6, 9 (add 3). The next number belongs to the first series: 14 + 2 = 16.

  13. Tanong 13 ng 18

    What letter comes next in the series B, D, G, K, ?
    Ipakita ang sagot

    Sagot: A. P

    The gaps grow: +2, +3, +4, so the next gap is +5. K is 11, and 11 + 5 = 16, which is P.

  14. Tanong 14 ng 18

    What number comes next in the series 100, 50, 52, 26, 28, ?
    Ipakita ang sagot

    Sagot: D. 14

    The steps alternate: divide by 2, then add 2. After 28 comes 28 ÷ 2 = 14.

  15. Tanong 15 ng 18

    What number comes next in the series 1, 2, 6, 24, 120, ?
    Ipakita ang sagot

    Sagot: D. 720

    Multiply by 2, then 3, then 4, then 5. The next step is × 6: 120 × 6 = 720.

  16. Tanong 16 ng 18

    One number in this series is wrong: 2, 6, 18, 52, 162. Which one?
    Ipakita ang sagot

    Sagot: A. 52

    Each number should be 3 times the one before: 2, 6, 18, 54, 162. So 52 should be 54.

  17. Tanong 17 ng 18

    What letter comes next in the series D, F, I, M, R, ?
    Ipakita ang sagot

    Sagot: A. X

    The gaps are +2, +3, +4, +5, so the next gap is +6. R is 18, and 18 + 6 = 24, which is X.

  18. Tanong 18 ng 18

    What number comes next in the series 3, 4, 8, 17, 33, ?
    Ipakita ang sagot

    Sagot: C. 58

    The differences are 1, 4, 9, 16 (square numbers). The next difference is 25: 33 + 25 = 58.

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