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Cornerstone · Grades 3–5 Keystones #1 4 March 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 March 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 1⁄6

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

    Solve: 5x - 7 = 28

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

    Calculate the hypotenuse when a = 4cm and b = 10cm

    Answer: 10.77cm
  4. 4. Ratio Sharing in a ratio

    Divide 150 in the ratio 1:1:4

    Answer: 25, 25 and 100
  5. 5. Statistics Mean

    Calculate the mean of: 25, 42, 46, 26, 31, 50, 46

    Answer: 38

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