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Cornerstone · Grades 3–5 Keystones #1 10 July 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 10 July 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄8 + 6⁄8

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 6x - 12 = 72

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 72 in the ratio 2:1

    Answer: 48 and 24
  5. 5. Statistics Mean

    Find the mean of: 20, 12, 14, 2

    Answer: 12

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