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Logical Reasoning Test Practice Course: Number and letter series

Temaquiz utan tidsgräns: 18 frågor om Number and letter series, med en förklaring efter varje svar. Frågor och svar blandas varje gång.

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  • Kontrollerad 13 oktober 2026
  • Faktagranskad 13 oktober 2026
Börja med lektionernaLogical Reasoning Course: Lessons: cirka 180 minuters läsning. Alla provfrågor tas upp i lektionerna.

Temaquiz 2: Number and letter series

  1. Fråga 1 av 18

    What number comes next in the series 4, 9, 14, 19, ?
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    Svar: D. 24

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

  2. Fråga 2 av 18

    What number comes next in the series 3, 6, 12, 24, ?
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    Svar: A. 48

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

  3. Fråga 3 av 18

    What number comes next in the series 81, 72, 63, 54, ?
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    Svar: D. 45

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

  4. Fråga 4 av 18

    What letter comes next in the series A, C, E, G, ?
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    Svar: 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. Fråga 5 av 18

    What number comes next in the series 1, 4, 9, 16, 25, ?
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    Svar: D. 36

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

  6. Fråga 6 av 18

    What letter comes next in the series Z, W, T, Q, ?
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    Svar: 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. Fråga 7 av 18

    What number comes next in the series 5, 7, 11, 17, 25, ?
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    Svar: D. 35

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

  8. Fråga 8 av 18

    What comes next in the series A1, C3, E5, G7, ?
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    Svar: 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. Fråga 9 av 18

    What number comes next in the series 2, 5, 11, 23, ?
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    Svar: A. 47

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

  10. Fråga 10 av 18

    What number comes next in the series 2, 3, 5, 8, 13, ?
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    Svar: D. 21

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

  11. Fråga 11 av 18

    What comes next in the series AZ, BY, CX, DW, ?
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    Svar: 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. Fråga 12 av 18

    What number comes next in the series 10, 3, 12, 6, 14, 9, ?
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    Svar: 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. Fråga 13 av 18

    What letter comes next in the series B, D, G, K, ?
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    Svar: 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. Fråga 14 av 18

    What number comes next in the series 100, 50, 52, 26, 28, ?
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    Svar: D. 14

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

  15. Fråga 15 av 18

    What number comes next in the series 1, 2, 6, 24, 120, ?
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    Svar: D. 720

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

  16. Fråga 16 av 18

    One number in this series is wrong: 2, 6, 18, 52, 162. Which one?
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    Svar: A. 52

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

  17. Fråga 17 av 18

    What letter comes next in the series D, F, I, M, R, ?
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    Svar: 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. Fråga 18 av 18

    What number comes next in the series 3, 4, 8, 17, 33, ?
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    Svar: C. 58

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

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