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JAMB Mathematics 2010 Question 23

Question 23

Binary Operations

If x * y = x + y2, find the value of (2*3)*5.

  1. A.36
  2. B.11
  3. C.25
  4. D.55
Show the answer and explanation

Answer: A (36)

Explanation

2 * 3 = 2 + 9 = 11, then 11 * 5 = 11 + 25 = 36.