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Cornerstone · Grades 3–5 Keystones #1 18 February 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 18 February 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄9 + 1⁄9

    Answer: 2⁄9
  2. 2. Algebra Two-step equations

    Solve: 3x - 10 = 11

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

    Calculate the hypotenuse when a = 5cm and b = 5cm. Give your answer to 2 decimal places

    Answer: 7.07cm
  4. 4. Ratio Sharing in a ratio

    Divide 52 in the ratio 1:2:1

    Answer: 13, 26 and 13
  5. 5. Statistics Mean

    Find the mean of: 19, 12, 11

    Answer: 14

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