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Cornerstone · Grades 3–5 Keystones #1 7 February 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 7 February 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄10 + 2⁄10

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 7x + 11 = 88

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 120 in the ratio 2:1

    Answer: 80 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 45, 38, 49, 18, 19, 42, 22, 40

    Answer: 34.1

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