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

Five GCSE retrieval questions · 1 January 2026 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄12 + 10⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 4x - 16 = 12

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 7cm

    Answer: 13.04cm
  4. 4. Ratio Sharing in a ratio

    Divide 132 in the ratio 3:4:4

    Answer: 36, 48 and 48
  5. 5. Statistics Mean

    Find the mean of: 19, 11, 10, 17

    Answer: 14.25

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