Practice Test Geeks(CFAT) Canadian Forces Aptitude Test Practice Test
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Problem Solving: Number Series Flashcards

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

Read the first 7 Problem Solving: Number Series flashcards as text

  1. What comes next: 2, 5, 11, 23, 47, ?

    Answer: 95

    Each term equals (previous × 2) + 1, so 47 × 2 + 1 = 95.

  2. Complete the series: 81, 27, 9, 3, ?

    Answer: 1

    Each term is divided by 3, so 3 ÷ 3 = 1.

  3. Find the next number: 3, 4, 6, 9, 13, 18, ?

    Answer: 24

    Differences increase by 1 each step (1, 2, 3, 4, 5, 6), so 18 + 6 = 24.

  4. What is the next term: 2, 2, 4, 12, 48, ?

    Answer: 240

    Each term is multiplied by an increasing integer (×1, ×2, ×3, ×4, ×5), so 48 × 5 = 240.

  5. What comes next: 17, 14, 11, 8, 5, ?

    Answer: 2

    Each term decreases by 3, so 5 − 3 = 2.

  6. Find the next number: 1, 2, 6, 24, 120, ?

    Answer: 720

    These are factorials (1!, 2!, 3!, 4!, 5!), so the next is 6! = 720.

  7. What is the next number: 4, 9, 7, 12, 10, 15, 13, ?

    Answer: 18

    The pattern alternates +5 and −2; after 13 comes 13 + 5 = 18.