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

  1. 1. Number Adding fractions

    Calculate: 4⁄6 + 1⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 2x + 12 = 18

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

    Calculate the hypotenuse when a = 9cm and b = 7cm

    Answer: 11.4cm
  4. 4. Ratio Sharing in a ratio

    Divide 133 in the ratio 1:4:2

    Answer: 19, 76 and 38
  5. 5. Statistics Mean

    Find the mean of: 10, 11, 11

    Answer: 10.666666666667

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