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Cornerstone · Grades 3–5 Keystones #1 26 September 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 26 September 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄12 + 2⁄12

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

    Solve: 3x + 12 = 39

    Answer: x = 9
  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 91 in the ratio 3:4

    Answer: 39 and 52
  5. 5. Statistics Mean

    Find the mean of: 2, 2, 18, 11, 2

    Answer: 7

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