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

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

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 1⁄5

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

    Solve: 2x - 12 = -2

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

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Share 102 in the ratio 1:2

    Answer: 34 and 68
  5. 5. Statistics Mean

    Find the mean of: 7, 18, 20, 6

    Answer: 12.75

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