Starter quiz

  • Which of these are triangular numbers?
    • 1  ✓
    • 8
    • 12
    • 15  ✓
    • 21  ✓
  • Which of these are prime numbers?
    • 1
    • 2  ✓
    • 11  ✓
    • 13  ✓
    • 15
  • 7, 8, 15, 23, 38 ... are the first five terms of a sequence. Which of these could be a rule for the sequence?
    • Add 1, add 3, add 5 and so on, differences increasing by 2 each time.
    • Add 1, add 7, add 13 and so on, differences increasing by 6 each time.
    • Add the two previous terms to get the next term.  ✓
    • Multiply the two previous terms to get the next term.
    • Multiply the previous term by 2 and subtract 1 to get the next term.
  • A linear sequence starts -4, 6, ... . The next term is ______.
    • '16' ✓
  • A geometric sequence starts -4, 6, ... . What is the next term?
    • -12
    • -9  ✓
    • 4
    • 9
    • 12
  • Which of these could be the first 5 terms in a sequence with a common second difference?
    • 27, 64, 125, 216, 343, ...
    • 28, 36, 45, 55, 66, ...  ✓
    • 30, 52, 76, 98, 122, ...
    • 32, 48, 72, 108, 162, ...
    • 36, 49, 64, 81, 100, ...  ✓
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