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JAMB Mathematics 1987 Question 4

Question 4

Fractions, Decimals and Approximation

Reduce each number to 2 significant figures and then evaluate
(0.021741 × 1.2047)/0.023789

  1. A.0.8
  2. B.0.9
  3. C.1.1
  4. D.1.2
Show the answer and explanation

Answer: C (1.1)

Explanation

To 2 s.f. the numbers are 0.022, 1.2 and 0.024. Then 0.022 × 1.2 = 0.0264 and 0.0264 ÷ 0.024 = 1.1.