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Cornerstone · Grades 3–5 Keystones #1 24 August 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 24 August 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄10 + 3⁄10

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

    Solve: 5x + 3 = 18

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

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 240 in the ratio 1:2:1

    Answer: 60, 120 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 43, 11, 16, 10, 18, 26, 15, 24. Give your answer to 2 decimal places

    Answer: 20.38

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