passwella.
Menu

JAMB Mathematics 1981 Question 29

Question 29

Fractions, Decimals and Approximation

Evaluate (6.3 × 105)/(8.1 × 103) to 3 significant figures

  1. A.77.80
  2. B.778.0
  3. C.7.870
  4. D.8.770
  5. E.88.70.
Show the answer and explanation

Answer: A (77.80)

Explanation

6.3 ÷ 8.1 = 0.7778 and 10⁵ ÷ 10³ = 100, giving 77.78, or 77.8 to three significant figures.