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Cornerstone · Grades 3–5 Keystones #1 21 January 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 January 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄7 + 2⁄3

    Answer: 26⁄21
  2. 2. Algebra Two-step equations

    Solve: 3x + 5 = 17

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 7cm

    Answer: 11.4cm
  4. 4. Ratio Sharing in a ratio

    Divide 133 in the ratio 3:1:3

    Answer: 57, 19 and 57
  5. 5. Statistics Mean

    Calculate the mean of: 46, 21, 46, 7, 41, 14

    Answer: 29.2

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