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Cornerstone · Grades 3–5 Keystones #1 14 April 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 14 April 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄5 + 1⁄5

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

    Solve: 8x - 15 = 17

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

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Share 44 in the ratio 3:1

    Answer: 33 and 11
  5. 5. Statistics Mean

    Calculate the mean of: 9, 17, 28, 43, 14, 45, 39. Give your answer to 2 decimal places

    Answer: 27.86

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