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Cornerstone · Grades 3–5 Keystones #1 23 September 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 23 September 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄10 + 2⁄10

    Answer: 3⁄5
  2. 2. Algebra Two-step equations

    Solve: 2x + 8 = 16

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

    Calculate the hypotenuse when a = 4cm and b = 6cm

    Answer: 7.21cm
  4. 4. Ratio Sharing in a ratio

    Divide 168 in the ratio 2:4:1

    Answer: 48, 96 and 24
  5. 5. Statistics Mean

    Calculate the mean of: 31, 20, 13, 33, 31, 35

    Answer: 27.2

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