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CogAT Quantitative Number Series Flashcards

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

Read the first 6 CogAT Quantitative Number Series flashcards as text

  1. What number comes next in the series: 3, 7, 15, 31, __?

    Answer: 63

    Each term is found by doubling the previous and adding 1 (3×2+1=7, 7×2+1=15, 15×2+1=31, 31×2+1=63).

  2. What number comes next in the series: 10, 13, 17, 22, __?

    Answer: 28

    The differences increase by 1 each time (3, 4, 5, 6), so add 6 to 22 to get 28.

  3. What number comes next in the series: 1, 2, 6, 24, __?

    Answer: 120

    Each term is multiplied by the next whole number (×1, ×2, ×3, ×4, ×5), so 24 × 5 = 120.

  4. What number comes next in the series: 4, 9, 19, 39, __?

    Answer: 79

    Each term is found by doubling the previous number and subtracting 1 (4×2+1=9, 9×2+1=19, 19×2+1=39, 39×2+1=79).

  5. What number comes next in the series: 16, 8, 4, 2, __?

    Answer: 1

    Each number is halved, so 2 ÷ 2 = 1.

  6. What number comes next in the series: 0, 3, 8, 15, 24, __?

    Answer: 35

    Each term equals n²−1 (0=1−1, 3=4−1, 8=9−1, 15=16−1, 24=25−1), so the next is 36−1=35.