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Cornerstone · Grades 3–5 Keystones #1 13 July 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 13 July 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 2⁄7

    Answer: 24⁄35
  2. 2. Algebra Two-step equations

    Solve: 8x - 15 = 57

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

    Calculate the hypotenuse when a = 6cm and b = 13cm. Give your answer to 2 decimal places

    Answer: 14.32cm
  4. 4. Ratio Sharing in a ratio

    Divide 160 in the ratio 3:4:1

    Answer: 60, 80 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 13, 10, 42, 34, 31, 50, 38, 12

    Answer: 28.75

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