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Cornerstone · Grades 3–5 Keystones #2 2 January 2026 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 January 2026 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄8 + 3⁄4

    Answer: 3⁄2
  2. 2. Algebra Two-step equations

    Solve: 6x - 13 = 29

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

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 160 in the ratio 4:3:1

    Answer: 80, 60 and 20
  5. 5. Statistics Mean

    Find the mean of: 8, 18, 9, 16, 14

    Answer: 13

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