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Cornerstone · Grades 3–5 Keystones #1 18 October 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 18 October 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄8 + 3⁄8

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 5x + 12 = 67

    Answer: x = 11
  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 48 in the ratio 1:3

    Answer: 12 and 36
  5. 5. Statistics Mean

    Calculate the mean of: 6, 9, 18, 30, 40, 34. Give your answer to 2 decimal places

    Answer: 22.83

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