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

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

  1. 1. Number Adding fractions

    Calculate: 6⁄12 + 5⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x + 14 = 49

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

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

    Answer: 7.07cm
  4. 4. Ratio Sharing in a ratio

    Share 45 in the ratio 2:3

    Answer: 18 and 27
  5. 5. Statistics Mean

    Find the mean of: 20, 18, 20

    Answer: 19.333333333333

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