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GCE Mathematics 1990 Question 2

Question 2

Indices

If 32x = 27, what is x?

  1. A.1
  2. B.1.5
  3. C.4.5
  4. D.18
  5. E.40.5
Show the answer and explanation

Answer: B (1.5)

Explanation

27 = 33, so 2x = 3 and x = 1.5.