Mathematics 0580 · IGCSE · Limits of accuracy

Limits of accuracy — practice question

A square has an area of $42.5\text{ cm}^2$, accurate to the nearest $0.5\text{ cm}^2$.

(main)[2]

Calculate the lower bound for the length of a side of the square.

Worked solution & mark scheme

This 2-mark question has a full step-by-step worked solution and mark scheme. One marking point: “$42.25$ is obtained from $42.5-0.25$.” …