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Cornerstone · Grades 3–5 Keystones #1 11 March 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 March 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄10 + 2⁄10

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

    Solve: 7x - 14 = 14

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 11cm

    Answer: 16.28cm
  4. 4. Ratio Sharing in a ratio

    Divide 70 in the ratio 2:2:1

    Answer: 28, 28 and 14
  5. 5. Statistics Mean

    Calculate the mean of: 11, 35, 16, 9, 18, 36, 9, 45

    Answer: 22.4

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