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

Five GCSE retrieval questions · 5 June 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄6 + 3⁄7

    Answer: 25⁄42
  2. 2. Algebra Two-step equations

    Solve: 6x + 10 = 70

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

    Calculate the hypotenuse when a = 12cm and b = 5cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 253 in the ratio 3:4:4

    Answer: 69, 92 and 92
  5. 5. Statistics Mean

    Calculate the mean of: 36, 31, 12, 20, 38, 21

    Answer: 26.3

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