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Cornerstone · Grades 3–5 Keystones #1 12 May 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 12 May 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 3x + 13 = 49

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 8cm

    Answer: 10.63cm
  4. 4. Ratio Sharing in a ratio

    Divide 66 in the ratio 3:2:1

    Answer: 33, 22 and 11
  5. 5. Statistics Mean

    Calculate the mean of: 45, 32, 20, 13, 27, 37

    Answer: 29

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