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Cornerstone · Grades 3–5 Keystones #1 20 January 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 January 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 3⁄4

    Answer: 13⁄12
  2. 2. Algebra Two-step equations

    Solve: 5x + 8 = 63

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 14cm

    Answer: 14.32cm
  4. 4. Ratio Sharing in a ratio

    Share 30 in the ratio 4:1

    Answer: 24 and 6
  5. 5. Statistics Mean

    Calculate the mean of: 32, 22, 50, 27, 45, 13, 30, 37

    Answer: 32

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