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Cornerstone · Grades 3–5 Keystones #1 10 February 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 February 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄7 + 5⁄6

    Answer: 71⁄42
  2. 2. Algebra Two-step equations

    Solve: 5x - 10 = 40

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 84 in the ratio 2:1

    Answer: 56 and 28
  5. 5. Statistics Mean

    Find the mean of: 11, 4, 18

    Answer: 11

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