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Cornerstone · Grades 3–5 Keystones #1 22 July 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 22 July 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄12 + 5⁄12

    Answer: 7⁄12
  2. 2. Algebra Two-step equations

    Solve: 3x - 18 = -6

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 6cm

    Answer: 7.81cm
  4. 4. Ratio Sharing in a ratio

    Divide 91 in the ratio 3:3:1

    Answer: 39, 39 and 13
  5. 5. Statistics Mean

    Calculate the mean of: 20, 34, 31, 18, 30, 48

    Answer: 30.2

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