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Cornerstone · Grades 3–5 Keystones #1 17 June 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 17 June 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄10 + 3⁄10

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

    Solve: 2x + 6 = 24

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

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 84 in the ratio 3:4

    Answer: 36 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 8, 10, 45, 29, 16, 6, 43, 23

    Answer: 22.5

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