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Cornerstone · Grades 3–5 Keystones #1 17 February 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 17 February 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄12 + 2⁄12

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

    Solve: 7x - 19 = 16

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 9.9cm
  4. 4. Ratio Sharing in a ratio

    Divide 168 in the ratio 1:1:2

    Answer: 42, 42 and 84
  5. 5. Statistics Mean

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

    Answer: 14

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