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Cornerstone · Grades 3–5 Keystones #1 14 April 2016 Skills week 1 of 7
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Five GCSE retrieval questions · 14 April 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄5 + 2⁄5

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

    Solve: 4x + 10 = 30

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 30 in the ratio 1:2

    Answer: 10 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 22, 39, 15, 20, 8, 25, 34, 9

    Answer: 21.5

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