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Cornerstone · Grades 3–5 Keystones #1 18 March 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 18 March 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄8 + 1⁄8

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 4x + 14 = 50

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 210 in the ratio 1:2:2

    Answer: 42, 84 and 84
  5. 5. Statistics Mean

    Calculate the mean of: 38, 48, 21, 41, 26, 17, 16, 12. Give your answer to 2 decimal places

    Answer: 27.38

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