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Cornerstone · Grades 3–5 Keystones #1 29 October 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 29 October 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 1⁄5

    Answer: 13⁄15
  2. 2. Algebra Two-step equations

    Solve: 6x + 7 = 61

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Share 60 in the ratio 3:2

    Answer: 36 and 24
  5. 5. Statistics Mean

    Find the mean of: 14, 4, 15

    Answer: 11

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