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

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

  1. 1. Number Adding fractions

    Add: 1⁄8 + 1⁄4

    Answer: 3⁄8
  2. 2. Algebra Two-step equations

    Solve: 3x - 10 = 11

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

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 140 in the ratio 3:4

    Answer: 60 and 80
  5. 5. Statistics Mean

    Calculate the mean of: 23, 40, 31, 5, 34, 49, 31, 7

    Answer: 27.5

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