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Cornerstone · Grades 3–5 Keystones #1 20 July 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 20 July 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄7 + 3⁄8

    Answer: 69⁄56
  2. 2. Algebra Two-step equations

    Solve: 4x + 13 = 45

    Answer: x = 8
  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 252 in the ratio 2:4:3

    Answer: 56, 112 and 84
  5. 5. Statistics Mean

    Calculate the mean of: 40, 23, 9, 37, 15, 31, 49, 47. Give your answer to 2 decimal places

    Answer: 31.38

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