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

  1. 1. Number Adding fractions

    Calculate: 5⁄10 + 4⁄10

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 6x + 4 = 40

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 133 in the ratio 2:1:4

    Answer: 38, 19 and 76
  5. 5. Statistics Mean

    Calculate the mean of: 24, 48, 20, 8, 11, 14. Give your answer to 2 decimal places

    Answer: 20.83

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