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Cornerstone · Grades 3–5 Keystones #1 19 November 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 19 November 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄8 + 1⁄8

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 7x + 13 = 76

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

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 48 in the ratio 1:2

    Answer: 16 and 32
  5. 5. Statistics Mean

    Calculate the mean of: 48, 8, 28, 24, 32, 28, 38. Give your answer to 2 decimal places

    Answer: 29.43

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