Mathematics 4024 · O Level · Limits of accuracy

Limits of accuracy — practice question

Petra is thinking of a number. It is a multiple of 7. Petra states: If I write my number to the nearest ten, the result is 30.
(main)[2]

Find Petra's number.

Worked solution & mark scheme

This 2-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI