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Cornerstone · Grades 3–5 Keystones #1 26 March 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 26 March 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄12 + 1⁄12

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 7x + 8 = 57

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

    Calculate the hypotenuse when a = 10cm and b = 15cm

    Answer: 18.03cm
  4. 4. Ratio Sharing in a ratio

    Divide 330 in the ratio 4:4:3

    Answer: 120, 120 and 90
  5. 5. Statistics Mean

    Calculate the mean of: 30, 6, 27, 40, 49, 8

    Answer: 26.7

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