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Cornerstone · Grades 3–5 Keystones #1 16 September 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 16 September 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 1⁄4

    Answer: 7⁄12
  2. 2. Algebra Two-step equations

    Solve: 4x - 14 = 6

    Answer: x = 5
  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 130 in the ratio 4:3:3

    Answer: 52, 39 and 39
  5. 5. Statistics Mean

    Calculate the mean of: 42, 18, 17, 8, 12, 33, 12, 39. Give your answer to 2 decimal places

    Answer: 22.63

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