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

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

  1. 1. Number Adding fractions

    Add: 3⁄7 + 3⁄6

    Answer: 13⁄14
  2. 2. Algebra Two-step equations

    Solve: 6x + 15 = 87

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 14cm

    Answer: 14.87cm
  4. 4. Ratio Sharing in a ratio

    Share 48 in the ratio 2:1

    Answer: 32 and 16
  5. 5. Statistics Mean

    Calculate the mean of: 21, 45, 5, 17, 5, 21

    Answer: 19

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