Violet and Wilfred each gave their running times for 200 m, rounded to the nearest second. Violet's time was 36 seconds, while Wilfred's time was 39 seconds.
(main)[2]
Find the upper bound of the difference between their times.
Worked solution & mark scheme
This 2-mark question has a full step-by-step worked solution and mark scheme. One marking point: “4” …