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Cornerstone · Grades 3–5 Keystones #1 1 September 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 1 September 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄8 + 3⁄4

    Answer: 1⁄1
  2. 2. Algebra Two-step equations

    Solve: 6x - 5 = 55

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 12cm

    Answer: 13.42cm
  4. 4. Ratio Sharing in a ratio

    Divide 117 in the ratio 3:4:2

    Answer: 39, 52 and 26
  5. 5. Statistics Mean

    Calculate the mean of: 38, 38, 21, 10, 38, 41, 10, 43

    Answer: 29.9

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