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

  1. 1. Number Adding fractions

    Calculate: 8⁄10 + 1⁄10

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 2x - 10 = -2

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

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

    Divide 133 in the ratio 1:2:4

    Answer: 19, 38 and 76
  5. 5. Statistics Mean

    Find the mean of: 12, 14, 9, 3, 7

    Answer: 9

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