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Cornerstone · Grades 3–5 Keystones #1 21 January 2023 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 January 2023 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 1⁄7

    Answer: 41⁄42
  2. 2. Algebra Two-step equations

    Solve: 5x + 7 = 62

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

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Share 80 in the ratio 4:1

    Answer: 64 and 16
  5. 5. Statistics Mean

    Find the mean of: 5, 12, 20, 14, 12

    Answer: 12.6

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