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 is the next number in the series: 3, 7, 11, 15, 19, ?

    Answer: 23

    Each term increases by 4, so 19 + 4 = 23.

  2. What comes next: 2, 6, 18, 54, ?

    Answer: 162

    Each term is multiplied by 3, so 54 × 3 = 162.

  3. Find the missing number: 100, 90, 81, 73, 66, ?

    Answer: 60

    The differences decrease by 1 each step (−10, −9, −8, −7, −6), so 66 − 6 = 60.

  4. What is the next term: 1, 4, 9, 16, 25, ?

    Answer: 36

    These are perfect squares (1², 2², 3², 4², 5²), so the next is 6² = 36.

  5. Which number comes next: 5, 10, 8, 16, 14, ?

    Answer: 28

    The pattern alternates between ×2 and −2; 14 × 2 = 28.

  6. Find the next number: 3, 5, 9, 17, 33, ?

    Answer: 65

    Each term equals (previous × 2) − 1, so 33 × 2 − 1 = 65.

  7. What comes next in the sequence: 1, 2, 4, 7, 11, 16, ?

    Answer: 22

    Differences between terms are 1, 2, 3, 4, 5, 6 — the next difference is 6, giving 16 + 6 = 22.