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Number and Letter Sequences Flashcards

7 cards from real GCAT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Number and Letter Sequences flashcards as text

  1. What number is missing? 2, 6, 18, ___, 162

    Answer: 54

    Each term is multiplied by 3, so 18 × 3 = 54.

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

    Answer: N

    Each letter moves back 3 positions, so Q − 3 = N.

  3. Complete the sequence: 1, 8, 27, 64, ___

    Answer: 125

    These are perfect cubes (1³, 2³, 3³, 4³), so the next is 5³ = 125.

  4. Which comes next? AZ, BY, CX, DW, ___

    Answer: EV

    The first letter advances (A→B→C→D→E) and the second retreats (Z→Y→X→W→V), giving EV.

  5. What is missing? 4, 7, 12, 19, 28, ___

    Answer: 39

    Differences increase by 2 each time (+3,+5,+7,+9,+11), so 28 + 11 = 39.

  6. Identify the next term: Z1, Y3, X5, W7, ___

    Answer: V9

    The letter decreases one step (Z→Y→X→W→V) and the number increases by 2 (1→3→5→7→9), giving V9.

  7. What comes next? 256, 64, 16, 4, ___

    Answer: 1

    Each term is divided by 4 (or multiplied by ¼), so 4 ÷ 4 = 1.