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

  1. 1. Number Adding fractions

    Calculate: 1⁄5 + 2⁄5

    Answer: 3⁄5
  2. 2. Algebra Two-step equations

    Solve: 8x - 18 = 22

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

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Share 24 in the ratio 3:1

    Answer: 18 and 6
  5. 5. Statistics Mean

    Find the mean of: 8, 2, 7, 15, 5

    Answer: 7.4

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