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Mathematics

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Quizzes in Mathematics for Grade 8

A student says x^2 + x^3 = x^5. What is the mistake?

  • There is no mistake
  • The bases are different
  • Unlike powers were added as if multiplying
  • The answer should be x^6
Correct answer(s):
  • Unlike powers were added as if multiplying

What type of equation is 5x – 2 = 5x + 1?

  • No solution
  • Identity: true for every value of x
  • One solution: x = 3
  • One solution: x = 0
Correct answer(s):
  • No solution

The length of a rectangle is 7 cm more than its width. If the perimeter is 30 cm, what is the width?

  • 7 cm
  • 11 cm
  • 4 cm
Correct answer(s):
  • 4 cm