Subject

Mathematics

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Quizzes in Mathematics

Factorize: x² + 13x + 42.

  • (x – 7)(x – 6)
  • (x + 7)(x – 6)
  • (x + 13)(x + 42)
  • x(x + 13) + 42
  • (x + 7)(x + 6)
Correct answer(s):
  • (x + 7)(x + 6)

Solve the system: 1x + 2y = 9 and 2x – 3y = -31.

  • x = 7, y = -5
  • x = 9, y = -31
  • x = -5, y = 7
  • x = 5, y = -7
  • x = -4, y = 6
Correct answer(s):
  • x = -5, y = 7

Multiply the matrix [[-4, 6], [7, 1]] by 3.

  • [[-1, 9], [10, 4]]
  • [[-12, 18], [21, 3]]
  • [[-4, 18], [21, 1]]
Correct answer(s):
  • [[-12, 18], [21, 3]]

A fair 4-section spinner and a fair 3-section spinner are spun once. What is the probability of getting one chosen section on each spinner?

  • 2/12
  • 1/12
  • 1/7
  • 3/12
  • 4/3
Correct answer(s):
  • 1/12

If U = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12} and A = {2, 4, 6, 9, 10}, what is A′?

  • {}
  • {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}
  • {2, 4, 6, 9, 10}
  • {1, 3, 5, 7, 8, 11, 12}
Correct answer(s):
  • {1, 3, 5, 7, 8, 11, 12}

In a class of 37 students, 18 study only Algebra, 13 study only Geometry, and 11 study both. How many study Algebra or Geometry?

  • 11
  • 53
  • 42
  • 37
  • 31
Correct answer(s):
  • 42

Let A = {3, 5, 6, 9, 10, 11} and B = {6, 7, 10, 11, 13, 17}. What is A ∩ B?

  • {6, 10, 11}
  • {3, 5, 9}
  • {3, 5, 6, 7, 9, 10, 11, 13, 17}
  • {}
Correct answer(s):
  • {6, 10, 11}

A bag has 3 red, 6 blue, and 5 green marbles. What is the probability of choosing a red marble?

  • 5/14
  • 3/9
  • 14/3
  • 3/14
  • 6/14
Correct answer(s):
  • 3/14