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Cornerstone · Grades 3–5 Keystones #1 31 December 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 31 December 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 3⁄4

    Answer: 19⁄12
  2. 2. Algebra Two-step equations

    Solve: 4x - 16 = 20

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 15cm

    Answer: 16.55cm
  4. 4. Ratio Sharing in a ratio

    Divide 207 in the ratio 2:3:4

    Answer: 46, 69 and 92
  5. 5. Statistics Mean

    Calculate the mean of: 14, 43, 43, 20, 14, 42, 29

    Answer: 29.3

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