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Cornerstone · Grades 3–5 Keystones #1 30 March 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 30 March 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄10 + 5⁄10

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

    Solve: 6x + 15 = 75

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Share 114 in the ratio 1:2

    Answer: 38 and 76
  5. 5. Statistics Mean

    Calculate the mean of: 34, 10, 26, 25, 28, 27, 27, 20. Give your answer to 2 decimal places

    Answer: 24.63

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