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

Five GCSE retrieval questions · 7 January 2023 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 1⁄4

    Answer: 13⁄12
  2. 2. Algebra Two-step equations

    Solve: 5x - 12 = 53

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 14cm

    Answer: 16.12cm
  4. 4. Ratio Sharing in a ratio

    Divide 114 in the ratio 1:2:3

    Answer: 19, 38 and 57
  5. 5. Statistics Mean

    Calculate the mean of: 18, 31, 14, 5, 39, 50, 33

    Answer: 27.1

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