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Cornerstone · Grades 3–5 Keystones #1 25 July 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 July 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄9 + 3⁄9

    Answer: 4⁄9
  2. 2. Algebra Two-step equations

    Solve: 2x + 6 = 12

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

    Calculate the hypotenuse when a = 12cm and b = 4cm

    Answer: 12.65cm
  4. 4. Ratio Sharing in a ratio

    Share 52 in the ratio 1:3

    Answer: 13 and 39
  5. 5. Statistics Mean

    Calculate the mean of: 23, 42, 21, 43, 34, 39, 33

    Answer: 33.6

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