Logical Reasoning Test Practice Course: Number and letter series

1. السؤال 1 من 18

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

   • A29
   • B23
   • C25
   • D24
   أظهر الإجابة

   الإجابة: D. 24

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

2. السؤال 2 من 18

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

   • A48
   • B36
   • C30
   • D42
   أظهر الإجابة

   الإجابة: A. 48

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

3. السؤال 3 من 18

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

   • A46
   • B36
   • C44
   • D45
   أظهر الإجابة

   الإجابة: D. 45

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

4. السؤال 4 من 18

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

   • AH
   • BJ
   • CK
   • DI
   أظهر الإجابة

   الإجابة: 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. السؤال 5 من 18

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

   • A30
   • B35
   • C49
   • D36
   أظهر الإجابة

   الإجابة: D. 36

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

6. السؤال 6 من 18

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

   • AN
   • BM
   • CP
   • DO
   أظهر الإجابة

   الإجابة: 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. السؤال 7 من 18

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

   • A34
   • B37
   • C33
   • D35
   أظهر الإجابة

   الإجابة: D. 35

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

8. السؤال 8 من 18

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

   • AI9
   • BH8
   • CJ9
   • DI8
   أظهر الإجابة

   الإجابة: 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. السؤال 9 من 18

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

   • A47
   • B46
   • C45
   • D35
   أظهر الإجابة

   الإجابة: A. 47

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

10. السؤال 10 من 18

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

    • A18
    • B26
    • C20
    • D21
    أظهر الإجابة

    الإجابة: D. 21

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

11. السؤال 11 من 18

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

    • AEV
    • BEU
    • CEW
    • DFV
    أظهر الإجابة

    الإجابة: 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. السؤال 12 من 18

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

    • A11
    • B12
    • C16
    • D18
    أظهر الإجابة

    الإجابة: 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. السؤال 13 من 18

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

    • AP
    • BN
    • CO
    • DQ
    أظهر الإجابة

    الإجابة: 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. السؤال 14 من 18

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

    • A30
    • B56
    • C13
    • D14
    أظهر الإجابة

    الإجابة: D. 14

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

15. السؤال 15 من 18

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

    • A144
    • B600
    • C240
    • D720
    أظهر الإجابة

    الإجابة: D. 720

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

16. السؤال 16 من 18

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

    • A52
    • B162
    • C6
    • D18
    أظهر الإجابة

    الإجابة: A. 52

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

17. السؤال 17 من 18

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

    • AX
    • BW
    • CV
    • DY
    أظهر الإجابة

    الإجابة: 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. السؤال 18 من 18

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

    • A66
    • B50
    • C58
    • D49
    أظهر الإجابة

    الإجابة: C. 58

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

لوحة المفاتيح: 1–4 للإجابة، وEnter للسؤال التالي.