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Cornerstone · Grades 3–5 Keystones #1 23 July 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 23 July 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄8 + 3⁄8

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

    Solve: 2x + 3 = 27

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

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 68 in the ratio 1:3

    Answer: 17 and 51
  5. 5. Statistics Mean

    Find the mean of: 9, 6, 21, 20

    Answer: 14

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