JAMB 1993 · UME · Q2

Evaluate $\frac{3524}{0.05}$ correct to 3 significant figures.

Worked solution (try it first)

Dividing by 0.05 is the same as multiplying by 20: $3524 \times 20 = 70\,480$ .
To 3 significant figures, keep 7, 0, 4 and look at the next figure, 8.
Round up to 705, and keep the zeros to hold the place value: $70\,500$ , option D.