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Number Series MCQs

3question(s) · click a question to reveal the answer and explanation.

  1. Find the next number in the series: 2, 6, 12, 20, 30, ?
    a) 36
    b) 40
    c) 42
    d) 44
    View Answer & Explanation

    Correct answer: C — 42

    Explanation: The differences between consecutive terms are 4, 6, 8, 10, 12 (increasing by 2 each time). So the next term = 30 + 12 = 42. (This is also the pattern n x (n+1): 1x2=2, 2x3=6, 3x4=12, 4x5=20, 5x6=30, 6x7=42.)

  2. Find the next number in the series: 2, 6, 12, 20, 30, ?
    a) 36
    b) 40
    c) 42
    d) 44
    View Answer & Explanation

    Correct answer: C — 42

    Explanation: The differences between consecutive terms are 4, 6, 8, 10, 12 (increasing by 2 each time). So the next term = 30 + 12 = 42. (This is also the pattern n x (n+1): 1x2=2, 2x3=6, 3x4=12, 4x5=20, 5x6=30, 6x7=42.)

  3. Find the next number in the series: 2, 6, 12, 20, 30, ?
    a) 36
    b) 40
    c) 42
    d) 44
    View Answer & Explanation

    Correct answer: C — 42

    Explanation: The differences between consecutive terms are 4, 6, 8, 10, 12 (increasing by 2 each time). So the next term = 30 + 12 = 42. (This is also the pattern n x (n+1): 1x2=2, 2x3=6, 3x4=12, 4x5=20, 5x6=30, 6x7=42.)