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Cornerstone · Grades 3–5 Keystones #1 13 September 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 13 September 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄11 + 3⁄11

    Answer: 8⁄11
  2. 2. Algebra Two-step equations

    Solve: 2x - 20 = -6

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

    Calculate the hypotenuse when a = 8cm and b = 6cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 78 in the ratio 1:4:1

    Answer: 13, 52 and 13
  5. 5. Statistics Mean

    Find the mean of: 20, 9, 19, 11, 11

    Answer: 14

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