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Cornerstone · Grades 3–5 Keystones #1 4 July 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 4 July 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 1⁄5

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

    Solve: 3x - 18 = 24

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 14cm

    Answer: 17.2cm
  4. 4. Ratio Sharing in a ratio

    Divide 64 in the ratio 1:1:2

    Answer: 16, 16 and 32
  5. 5. Statistics Mean

    Calculate the mean of: 38, 24, 45, 9, 47, 18, 21

    Answer: 28.9

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