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Cornerstone · Grades 3–5 Keystones #1 31 March 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 31 March 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄8 + 1⁄6

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 8x - 10 = 94

    Answer: x = 13
  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 115 in the ratio 3:1:1

    Answer: 69, 23 and 23
  5. 5. Statistics Mean

    Calculate the mean of: 29, 27, 8, 50, 34, 39, 24, 6. Give your answer to 2 decimal places

    Answer: 27.13

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