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Number Series Flashcards

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

Read the first 6 Number Series flashcards as text

  1. What is the next number in the series? 3, 6, 12, 24, 48, ___

    Answer: 96

    Each term doubles: 3×2=6, 6×2=12, ..., 48×2=96.

  2. What number completes the series? 100, 91, 82, 73, 64, ___

    Answer: 55

    Each term decreases by 9: 100−9=91, ..., 64−9=55.

  3. Find the missing number: 2, 5, 11, 23, 47, ___

    Answer: 95

    Each term = previous × 2 + 1: 47×2+1=95.

  4. What is the next term? 1, 1, 2, 3, 5, 8, 13, ___

    Answer: 21

    This is the Fibonacci sequence: each term = sum of the two preceding terms. 8+13=21.

  5. Identify the next number: 4, 9, 16, 25, 36, ___

    Answer: 49

    These are perfect squares: 2²=4, 3²=9, ..., 6²=36, 7²=49.

  6. What comes next? 80, 40, 20, 10, ___

    Answer: 5

    Each term is halved: 80÷2=40, ..., 10÷2=5.

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