Practice Test GeeksPI - Cognitive Assessment Practice Test
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Number Series Problems Flashcards

7 cards from real PI 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 Series Problems flashcards as text

  1. What is the next number: 1, 2, 4, 7, 11, 16, ___?

    Answer: 22

    Differences are 1, 2, 3, 4, 5, 6 — increasing by 1, so 16 + 6 = 22.

  2. Find the missing number: 512, 256, 128, ___, 32

    Answer: 64

    Each term is halved, so 128 ÷ 2 = 64, and 64 ÷ 2 = 32 confirms it.

  3. Complete the series: 1, 3, 7, 15, 31, ___

    Answer: 63

    Each term follows the rule 2n − 1 (or: ×2 +1), so 31 × 2 + 1 = 63.

  4. What comes next: 9, 16, 25, 36, 49, ___?

    Answer: 64

    These are perfect squares starting at 3², and the next is 8² = 64.

  5. Find the next term: 5, 7, 12, 19, 31, ___?

    Answer: 50

    Each term is the sum of the two preceding terms, so 19 + 31 = 50.

  6. What is the missing number: 1000, 200, 40, ___, 1.6?

    Answer: 8

    Each term is divided by 5, so 40 ÷ 5 = 8, and 8 ÷ 5 = 1.6 confirms it.

  7. What comes next: 3, 5, 8, 13, 21, 34, ___?

    Answer: 55

    Each term is the sum of the two previous terms (Fibonacci-type), so 21 + 34 = 55.