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Cornerstone · Grades 3–5 Keystones #1 24 April 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 24 April 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄5 + 3⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 5x + 9 = 64

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

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 117 in the ratio 2:3:4

    Answer: 26, 39 and 52
  5. 5. Statistics Mean

    Find the mean of: 2, 9, 22

    Answer: 11

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