MDCAT Logical Reasoning chapter 2: Logical reasoning · Series MCQs with answers

By Team Megalecture · Updated 4 Nov 2026

25 exam-style questions on Logical reasoning · Series, each with the answer and a short explanation. Ten of them are below to try. The chapter test draws ten fresh questions each time and is marked the moment you finish, with your score by topic.

25 questions · 1 topics · 10 per test

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What chapter 2 covers

Ten Logical reasoning · Series questions with answers

Try each one, then open the answer. These ten stay the same; the test draws new ones every time.

1. Find the next term: 4, 6, 12, 14, 28, 30, ?

  1. A
    56
  2. B
    60
  3. C
    32
  4. D
    62
Show answer

Answer: B. The steps alternate +2 and ×2: 28 + 2 = 30, then 30 × 2 = 60. 32 repeats the +2 step.

2. Find the next term: AB, DE, GH, JK, ?

  1. A
    NO
  2. B
    LM
  3. C
    MN
  4. D
    KL
Show answer

Answer: C. Each pair starts 3 letters after the last pair started: A, D, G, J, M. So MN.

3. Find the next term: 2, 6, 12, 20, 30, ?

  1. A
    44
  2. B
    40
  3. C
    42
  4. D
    36
Show answer

Answer: C. Differences are 4, 6, 8, 10, so the next is 30 + 12 = 42. (Each term is n(n + 1).) 40 comes from repeating the last difference.

4. Find the next term: ★, ★★◆, ★★★◆◆, ★★★★◆◆◆, ?

  1. A
    ★★★★◆◆◆◆
  2. B
    ★★★★★◆◆◆
  3. C
    ★★★★★★◆◆◆◆
  4. D
    ★★★★★◆◆◆◆
Show answer

Answer: D. Each step adds one ★ and one ◆, so the 5th term has 5 stars and 4 diamonds.

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

  1. A
    J
  2. B
    H
  3. C
    K
  4. D
    I
Show answer

Answer: D. Each letter skips one: A, C, E, G, I (+2 each time). H is the result of adding only 1.

6. Find the next term: Z, X, U, Q, ?

  1. A
    L
  2. B
    N
  3. C
    K
  4. D
    M
Show answer

Answer: A. Going back 2, 3, 4, then 5 letters: Q is 17th, 17 − 5 = 12, which is L. M comes from going back 4 again.

7. Find the next term: 5, 11, 23, 47, ?

  1. A
    95
  2. B
    94
  3. C
    93
  4. D
    71
Show answer

Answer: A. Each term is double the previous plus 1: 2 × 47 + 1 = 95. 71 comes from adding 24 again.

8. Find the next term: 2, 3, 5, 7, 11, 13, ?

  1. A
    15
  2. B
    19
  3. C
    17
  4. D
    16
Show answer

Answer: C. These are prime numbers in order; the prime after 13 is 17. 15 = 3 × 5 is not prime.

9. Find the next term: AZ, BY, CX, DW, ?

  1. A
    DV
  2. B
    EU
  3. C
    FV
  4. D
    EV
Show answer

Answer: D. The first letter moves forward from A and the second moves back from Z: E and V.

10. Find the next term: KM, NP, QS, ?

  1. A
    UW
  2. B
    TV
  3. C
    SU
  4. D
    TU
Show answer

Answer: B. Each pair is two letters apart and the next pair starts 3 letters later: K, N, Q, T and M, P, S, V. So TV.

Start the chapter testAbout the MDCAT Logical Reasoning test

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Ways to practise this chapter

Logical reasoning · Series: questions students ask

How many Logical reasoning · Series MCQs are there?

25, each with the answer and a short explanation, across 1 topics: Letter and symbol series. Every chapter test draws ten of them, so you can take it many times.

Is the MDCAT Logical Reasoning chapter 2 test free?

Yes. The test, the answers and the explanations are free and need no sign-up. Sign in only if you want your scores kept across devices.

How is the chapter test marked?

The moment you press Finish: your score, the right answer and an explanation for every question, and the ones you got wrong saved in My mistakes to retry.

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