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UI Post-UTME Mathematics 2016 Question 13

Question 13

Linear and Simultaneous Equations

A man is four times as old as his son. In four years time, he will be three times as old. What are their present ages?

  1. A.32 and 8
  2. B.40 and 6
  3. C.33 and 6
  4. D.30 and 10
Show the answer and explanation

Answer: A (32 and 8)

Explanation

4x + 4 = 3(x + 4) gives x = 8: the son is 8 and the man 32.