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Cornerstone · Grades 3–5 Keystones #1 9 February 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 9 February 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 7⁄8 + 3⁄6

    Answer: 11⁄8
  2. 2. Algebra Two-step equations

    Solve: 2x - 11 = 13

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

    Calculate the hypotenuse when a = 12cm and b = 4cm

    Answer: 12.65cm
  4. 4. Ratio Sharing in a ratio

    Share 90 in the ratio 3:2

    Answer: 54 and 36
  5. 5. Statistics Mean

    Find the mean of: 5, 8, 16, 14, 19

    Answer: 12.4

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