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Cornerstone · Grades 3–5 Keystones #1 21 June 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 21 June 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 1⁄5

    Answer: 31⁄30
  2. 2. Algebra Two-step equations

    Solve: 7x + 5 = 82

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 100 in the ratio 2:1:2

    Answer: 40, 20 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 21, 48, 15, 35, 14, 18, 13. Give your answer to 2 decimal places

    Answer: 23.43

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