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Cornerstone · Grades 3–5 Keystones #3 3 January 2026 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 3 January 2026 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄9 + 1⁄9

    Answer: 4⁄9
  2. 2. Algebra Two-step equations

    Solve: 2x + 13 = 33

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

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

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

    Divide 96 in the ratio 1:3:2

    Answer: 16, 48 and 32
  5. 5. Statistics Mean

    Calculate the mean of: 21, 42, 22, 29, 42, 19, 21

    Answer: 28

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