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Cornerstone · Grades 3–5 Keystones #1 13 July 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 13 July 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄8 + 3⁄5

    Answer: 27⁄20
  2. 2. Algebra Two-step equations

    Solve: 4x - 18 = 10

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 12cm. Give your answer to 2 decimal places

    Answer: 16.28cm
  4. 4. Ratio Sharing in a ratio

    Share 45 in the ratio 3:2

    Answer: 27 and 18
  5. 5. Statistics Mean

    Find the mean of: 11, 8, 10, 9, 17

    Answer: 11

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