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Cornerstone · Grades 3–5 Keystones #1 15 February 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 15 February 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄10 + 1⁄10

    Answer: 7⁄10
  2. 2. Algebra Two-step equations

    Solve: 4x + 6 = 38

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 11cm. Give your answer to 2 decimal places

    Answer: 13.6cm
  4. 4. Ratio Sharing in a ratio

    Divide 168 in the ratio 1:3:4

    Answer: 21, 63 and 84
  5. 5. Statistics Mean

    Calculate the mean of: 30, 9, 37, 12, 16, 28

    Answer: 22

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