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Cornerstone · Grades 3–5 Keystones #1 6 February 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 6 February 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 3⁄8

    Answer: 23⁄40
  2. 2. Algebra Two-step equations

    Solve: 3x - 15 = 12

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

    Calculate the hypotenuse when a = 11cm and b = 10cm. Give your answer to 2 decimal places

    Answer: 14.87cm
  4. 4. Ratio Sharing in a ratio

    Divide 156 in the ratio 3:1:2

    Answer: 78, 26 and 52
  5. 5. Statistics Mean

    Find the mean of: 11, 20, 8, 8, 13

    Answer: 12

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