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UI Post-UTME Mathematics 2018 (Model questions) Question 33

Question 33

Indices

Simplify 25½ × 8−⅔

  1. A.2½
  2. B.1¼
  3. C.10
  4. D.2½
Show the answer and explanation

Answer: B (1¼)

Explanation

25^½ = 5 and 8^(−2/3) = 1/4, so the product is 5/4 = 1¼.