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OAU Post-UTME Mathematics 2022 (Batch A) Question 4

Question 4

Surds

Simplify √(4 + √(21 + √(11 + √25)))

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

Answer: B (3)

Explanation

Work from the inside: √25 = 5, √(11 + 5) = 4, √(21 + 4) = 5, √(4 + 5) = 3.