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Cornerstone · Grades 3–5 Keystones #1 15 March 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 March 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 5⁄7

    Answer: 39⁄35
  2. 2. Algebra Two-step equations

    Solve: 6x - 15 = 69

    Answer: x = 14
  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 50 in the ratio 1:4

    Answer: 10 and 40
  5. 5. Statistics Mean

    Find the mean of: 17, 18, 15, 10

    Answer: 15

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