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Cornerstone · Grades 3–5 Keystones #1 20 July 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 20 July 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄12 + 1⁄12

    Answer: 1⁄4
  2. 2. Algebra Two-step equations

    Solve: 5x + 11 = 66

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 80 in the ratio 1:1:3

    Answer: 16, 16 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 23, 48, 33, 15, 25, 47, 36, 23

    Answer: 31.25

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