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WAEC Mathematics 1988 Question 12

Question 12

Fractions, Decimals and Approximation

The number 186 047 was corrected to 186 000. Which of the following can correctly describe the degree of approximation made? I. to the nearest hundred II. to the nearest thousand III. to 3 significant figures IV. to 4 significant figures

  1. A.I&III only
  2. B.I&IV only
  3. C.II&III only
  4. D.II&IV only
  5. E.All of them.
Show the answer and explanation

Answer: E (All of them.)

Explanation

186 047 rounds to 186 000 to the nearest hundred (047 < 50), to the nearest thousand, to 3 s.f. (186|047) and to 4 s.f. (1860|47), so all four descriptions are correct.