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Cornerstone · Grades 3–5 Keystones #1 10 April 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 10 April 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 2⁄6

    Answer: 7⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x - 18 = 10

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 8cm. Give your answer to 2 decimal places

    Answer: 8.94cm
  4. 4. Ratio Sharing in a ratio

    Divide 180 in the ratio 2:1:2

    Answer: 72, 36 and 72
  5. 5. Statistics Mean

    Find the mean of: 7, 4, 19

    Answer: 10

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