Maths Trivia Quiz 20

10 questions · 4 multiple choice · 6 number answers · scored out of 1000

Answer everything below, then hit finish for a scored breakdown. Number questions give partial credit for close guesses, so always take a shot.

  1. Multiple choicemedium
    What is the name for a number that equals the sum of its proper divisors?
  2. Number answereasy

    Hint: Simple division

  3. Number answervery hard
  4. Multiple choicemedium
    In set theory, what is the symbol ∪ used for?
  5. Number answermedium

    Hint: 17 times itself

  6. Number answereasy
  7. Multiple choiceeasy
    What is the average of 10, 20, 30, and 40?
  8. Number answerhard

    Hint: Thirty-three times twenty-seven

  9. Number answereasy
  10. Multiple choicehard
    What is the value of the infinite series 1 + 1/2 + 1/4 + 1/8 + ... ?

0 of 10 answered · 10 still blank (they score 0)

Answer key

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  1. What is the name for a number that equals the sum of its proper divisors?Perfect number
  2. What is 840 divided by 12?70
  3. What is 3 to the power of 7?2,187
  4. In set theory, what is the symbol ∪ used for?Union
  5. What is 17 squared?289
  6. What is 23 multiplied by 7?161
  7. What is the average of 10, 20, 30, and 40?25
  8. What is 33 multiplied by 27?891
  9. What is 75% of 200?150
  10. What is the value of the infinite series 1 + 1/2 + 1/4 + 1/8 + ... ?2

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