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

  1. 1. Number Adding fractions

    Calculate: 4⁄7 + 1⁄7

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

    Solve: 2x - 20 = -6

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 13cm

    Answer: 15.81cm
  4. 4. Ratio Sharing in a ratio

    Divide 126 in the ratio 1:2:4

    Answer: 18, 36 and 72
  5. 5. Statistics Mean

    Find the mean of: 9, 13, 16

    Answer: 12.666666666667

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