Practice Test GeeksPI - Cognitive Assessment Practice Test
← All PI Flashcard Decks

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: 5, 10, 8, 16, 14, 28, ___?

    Answer: 26

    The pattern alternates: ×2 then −2, so 28 − 2 = 26.

  2. Find the missing number: 4, 9, 16, 25, ___, 49

    Answer: 36

    The series is perfect squares (2², 3², 4², 5², 6², 7²), so the missing term is 6² = 36.

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

    Answer: 125

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

  4. What comes next: 2, 3, 5, 7, 11, 13, ___?

    Answer: 17

    These are consecutive prime numbers, and the next prime after 13 is 17.

  5. Find the next term: 50, 45, 55, 50, 60, 55, ___?

    Answer: 70

    The pattern alternates −5 and +10, so after 55 the next step is +10 = 65.

  6. What is the missing number: 6, 11, 21, 41, ___, 161?

    Answer: 81

    Each term is found by doubling the previous term and subtracting 1: 41×2−1 = 81.

  7. What comes next: 1, 4, 9, 16, 25, 36, ___?

    Answer: 49

    These are perfect squares (n²), so the next is 7² = 49.