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Cornerstone · Grades 3–5 Keystones #1 26 April 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 26 April 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 2⁄6

    Answer: 13⁄12
  2. 2. Algebra Two-step equations

    Solve: 8x - 13 = 59

    Answer: x = 9
  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 117 in the ratio 4:3:2

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

    Calculate the mean of: 7, 48, 49, 14, 45, 36, 37. Give your answer to 2 decimal places

    Answer: 33.71

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