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Cornerstone · Grades 3–5 Keystones #1 16 September 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 16 September 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 7x - 8 = 90

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 216 in the ratio 3:2:3

    Answer: 81, 54 and 81
  5. 5. Statistics Mean

    Calculate the mean of: 25, 26, 28, 11, 11, 40, 14. Give your answer to 2 decimal places

    Answer: 22.14

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