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Cornerstone · Grades 3–5 Keystones #1 21 April 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 April 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 3⁄8

    Answer: 31⁄40
  2. 2. Algebra Two-step equations

    Solve: 4x - 5 = 47

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 5cm

    Answer: 6.4cm
  4. 4. Ratio Sharing in a ratio

    Share 126 in the ratio 3:4

    Answer: 54 and 72
  5. 5. Statistics Mean

    Calculate the mean of: 42, 30, 26, 29, 34, 6, 39

    Answer: 29.4

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