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Cornerstone · Grades 3–5 Keystones #1 21 February 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 21 February 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄6 + 1⁄6

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 5x - 16 = 14

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 15cm

    Answer: 15.81cm
  4. 4. Ratio Sharing in a ratio

    Divide 145 in the ratio 1:3:1

    Answer: 29, 87 and 29
  5. 5. Statistics Mean

    Find the mean of: 16, 16, 19, 14, 18

    Answer: 16.6

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