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Number Sequences and Patterns Flashcards

7 cards from real IBEW 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 Sequences and Patterns flashcards as text

  1. Which number is next: 1, 2, 6, 24, 120, ___?

    Answer: 720

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

  2. Find the next value: 256, 64, 16, 4, ___?

    Answer: 1

    Each term is divided by 4, so 4 ÷ 4 = 1.

  3. What is the missing number: 11, 22, 33, ___, 55, 66?

    Answer: 44

    These are multiples of 11, so the missing term is 11 × 4 = 44.

  4. Complete the pattern: 2, 6, 18, 54, 162, ___?

    Answer: 486

    Each term is multiplied by 3, so 162 × 3 = 486.

  5. What comes next: 1, 3, 7, 15, 31, ___?

    Answer: 63

    Each term is doubled then 1 is added, so 31 × 2 + 1 = 63.

  6. Find the next number: 10, 9, 7, 4, 0, ___?

    Answer: −5

    The differences decrease by 1 each time (−1, −2, −3, −4, −5), so 0 − 5 = −5.

  7. Which number completes the sequence: 8, 16, 12, 24, 20, 40, ___?

    Answer: 36

    The pattern alternates ×2 and −4, so 40 − 4 = 36.