GCSE · Rounding & bounds

Upper and lower boundsExam-style questions

Why a rounded value hides half a unit of uncertainty each way, why the upper bound is a strict "less than", how truncation differs, and how to pick the right bounds when calculating — the ÷ and − traps included.

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23 questions · GCSE (Higher) level · mark scheme and worked solution on each · no sign-up to try

DifficultyAllLevel 1Level 2Level 3Level 4Level 5
  1. 1
    A length is 77 cm to the nearest centimetre. Write down the smallest possible length.
    Level 1 · 1 markTry it
  2. 2
    The height of a door is 198198 cm, correct to the nearest cm. Write down the upper bound of the height.
    Level 1 · 1 markTry it