College of Admission Tests Multan

Exponents

Solve the question of and select the option from the choices A through D/E. Check your Answer and view the explanation.

Question: 9

What is the value of x in 5x ÷ 5–3 = 55?
  • 1
  • 2
  • 3
  • 4

  Show/Hide Explanation 

Correct Answer: B

5x ÷ 5–3 = 55

5x 5–3 = 55

5x × 53 = 55

5x + 3 = 55

Equate the exponents of the same base.

x + 3 = 5

x = 5 - 3 = 2