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GCE Mathematics 1989 Question 20

Question 20

Indices

If 3y = 243, find the value of y.

  1. A.2
  2. B.3
  3. C.4
  4. D.5
  5. E.6.
Show the answer and explanation

Answer: D (5)

Explanation

243 = 3 × 3 × 3 × 3 × 3 = 35, so y = 5.