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Cornerstone · Grades 3–5 Keystones #1 20 June 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 20 June 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄12 + 6⁄12

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 7x + 9 = 79

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 4cm

    Answer: 12.65cm
  4. 4. Ratio Sharing in a ratio

    Share 25 in the ratio 2:3

    Answer: 10 and 15
  5. 5. Statistics Mean

    Calculate the mean of: 47, 44, 20, 6, 11, 7, 15, 38

    Answer: 23.5

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