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Cornerstone · Grades 3–5 Keystones #1 3 July 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 3 July 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄7 + 2⁄7

    Answer: 4⁄7
  2. 2. Algebra Two-step equations

    Solve: 8x - 12 = 108

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 48 in the ratio 1:3

    Answer: 12 and 36
  5. 5. Statistics Mean

    Calculate the mean of: 23, 25, 26, 23, 27, 24, 13

    Answer: 23

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