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Cornerstone · Grades 3–5 Keystones #1 9 July 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 9 July 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄7 + 2⁄7

    Answer: 5⁄7
  2. 2. Algebra Two-step equations

    Solve: 2x + 9 = 21

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 4cm

    Answer: 6.4cm
  4. 4. Ratio Sharing in a ratio

    Divide 72 in the ratio 1:2:3

    Answer: 12, 24 and 36
  5. 5. Statistics Mean

    Find the mean of: 6, 5, 11, 3, 2

    Answer: 5.4

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