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Cornerstone · Grades 3–5 Keystones #1 9 October 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 9 October 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 1⁄5

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

    Solve: 8x - 18 = 78

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

    Calculate the hypotenuse when a = 6cm and b = 14cm

    Answer: 15.23cm
  4. 4. Ratio Sharing in a ratio

    Share 96 in the ratio 2:1

    Answer: 64 and 32
  5. 5. Statistics Mean

    Calculate the mean of: 9, 44, 16, 35, 13, 6, 11, 49

    Answer: 22.9

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