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Cornerstone · Grades 3–5 Keystones #1 26 June 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 26 June 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 2⁄8

    Answer: 11⁄28
  2. 2. Algebra Two-step equations

    Solve: 2x + 11 = 19

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

    Calculate the hypotenuse when a = 8cm and b = 5cm. Give your answer to 2 decimal places

    Answer: 9.43cm
  4. 4. Ratio Sharing in a ratio

    Divide 117 in the ratio 2:4:3

    Answer: 26, 52 and 39
  5. 5. Statistics Mean

    Calculate the mean of: 17, 40, 25, 38, 25, 38, 17. Give your answer to 2 decimal places

    Answer: 28.57

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