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Cornerstone · Grades 3–5 Keystones #1 14 September 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 14 September 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄7 + 3⁄7

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

    Solve: 4x - 14 = 38

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 8cm

    Answer: 12.04cm
  4. 4. Ratio Sharing in a ratio

    Divide 138 in the ratio 3:1:2

    Answer: 69, 23 and 46
  5. 5. Statistics Mean

    Calculate the mean of: 13, 48, 38, 21, 33, 29, 20

    Answer: 28.9

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