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JAMB Mathematics 1995 Question 22

Question 22

Binary Operations

If a*b = +√(ab), evaluate 2*(12*27).

  1. A.12
  2. B.9
  3. C.6
  4. D.2
Show the answer and explanation

Answer: C (6)

Explanation

Work out the bracket first: 12*27 = √324 = 18. Then 2*18 = √36 = 6.