JAMB Mathematics 2016 Paper

Concept:Multiply the decimal values in the numerator and denominator first, then divide and round the result to four significant figures.Explanation:Calculate the numerator:$$0.8 \times 0.43 \times 0.031 = 0.010664$$Calculate the denominator:$$0.05 \times 0.72 \times 0.021 = 0.000756$$Now divide the numerator by the denominator:$$\frac{0.010664}{0.000756} = 14.105820\ldots$$Round $14.105820\ldots$ to four significant figures.The first four significant figures are $1$, $4$, $1$, and $0$.The next digit is $5$, so round the fourth digit up:$$14.105820\ldots \approx 14.11$$Answer:D. $14.11$